1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7420ec31c24684e6efc1e533054a97627c3070d81b5cfc6bfcc971434a7db1c6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6e8db63-bef3-4d8b-a10d-606706e68948.json and https://artists.proofprofile.net/proofs/artist/d6e8db63-bef3-4d8b-a10d-606706e68948.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe1600fdd99065dc65358277669b68a5e675be0eb6140aafc8a0644e1f92db2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2325096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276f70ea51084144cd34d2059c69983956a68c0b434ea78e667ca31edacb2b40. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8242201101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c13329dd84f302d30fba76b62f4ec28c9514016d61612442e227f3e4f1e7c8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8242201102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff2bee928bc92e63159d922062e17f47f4389e6185bdb5b756f3fe72a7ecd85. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8242201103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd8d6ab220f40fb98797c64ff12abfde4471fd7af14f7ccadf1a67a00d73aab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8242201105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52e9c85c8744775c0c1b1f7497a6275b77f2db78bb00a7604c79913edd01a5d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8242201106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1ca03304fb43425509a845cce5f735bd0ca1b7de32746086db10b733b06a3a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8242201108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5112232f012138905f5ed3a092ad44dcc4c230544fca377451cec38f6232360d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8242201109.
La Parva Ja Està Feta (Batre del Marquesat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa819b163056432cb42634021370162901c4259ca6ea9cc0e156028ffa43082f5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8242201110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9f890ba1aaf858b01a4b318fad1e48ac35d9b5851e27829890ea3915369fa4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8242201111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79677a871bc57abc133c74bf4e3d4351b1eafb585001f371a8cba2855c85f38. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8242201112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527d70c7ad2f3cb43637fc9521e680a52533bbbae6248989d561e8be2fdfe990. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8242201113.
La Granaïna del tio Palero (del poble de Montaverner)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1890b3aabb210a9e0f1297ea9656c7ff2dff11158bfa92a7e36017fc0a2eb5d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2069699.
El casamiento de Maria la Xapa (del poble de Sueca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48b874a43a1e64750bf5aa6ffbf3d49b3d7de56c193a9d334e2c8e91b1ff652. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2069700.
Jotes de quintos i de ronda (dels pobles de Canals i Vallada)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17229da7e62bfb9e9a16d005cd108a3a898a91c435fe6fcd41025f0969c75287. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2069702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c638eeaffb38d0b740cde741b6971b0369d5c37e9e010da197e5ea24dd6d48d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2069705.
Malaguenya De La Tia Emilieta (del poble de Barxeta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a881e80e982b1bd70bd4a6a9ad30ee35f33f36b74aef264a82cc3eda08e7ddd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2069709.
Quico El Célio, El Noi I El Mut De Ferreries
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b9421d3182e0e6ca48594675237ea306fb266930a572f0d13779303ff7ad32. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5301150064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c4d2b4be6e642744940b7fbb0858eb6614fa8c6a5a87fce3511a4658bd5efd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5301150065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d860bb9305213999962867f4f28d68c9d4f07b8a10e2d319e6c945eb34f3a2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5301150066.
Ai Mare, Jo Vull Casar-me (Cant de Batre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd679942210731481ccfa75e44bb4acb91d94dec9a12530bfe15c2a3d36880265. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5301150067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a62a7570f5b1091fd6b312ff0c187a8d4373235d01df0ccf640bda45b38cb17. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5301150068.
Jotes des de la Barraca (Jotes D'Amunt i Avall)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4446933832589b0fa4a333b92d41d93649df844f43a71e7bccde55669691b8b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5301150078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8a1823ae2a37b83dbe6ecec20e13be673c0742787a0a9f225c146db171eb38. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8510701221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f8fd3be36a8821e1271681a4ae036ec9f96e80e4071a1f99aea469974bb24e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8510701222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8716812d88727a0514be883772d9dd25cc273671c636d8e34d25a92d9ec1209. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8510701224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c91ef5a852b5749553059f3d8c0c4d3edc453144045a41c03d90f5a87be29b2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8510701226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600f03e3360184e53f935b9eedf225a58fdec6ef33a70f744461b9fa00178b2f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8510701228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51736879905d9f7257886a2028d81d3b68a56ea0af54052a176bce2cdd3be46b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8510701229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25fe3b5517ed930b603cde0c84f7c7a397e99287d0b86e256d0ae35c8abcc59. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5060915501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0150734edd6f833d432d69fb37afbde2b172669da10ca90a6f105351c63cfda1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5060915502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51597a39478de4e783d6c2f38441a6d6378e5c19f85be61641798ec5d9745d96. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5060915503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6247ea62271a4eed9bcf810723825d5c7dabd2a3a1e157c14ef8564bd2f68ea. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5060915504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d685e8d750d250a71d454050ccf43f81a7d3037f549b5033e6dd86ef53496e1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5060915505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331f83a549a64a802ba8ffb25bbe95f380f7b33e1a45d47bc3cc2d7429cf7fc9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5060915506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ba07adc832dd2a63e87f289953da78a454cce1954f1404d688825944fb9a2f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5060915507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d1ea0cf351f663a1db014971e101d3ffdb8fe9bd93474f6ad448d73361f587. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF2037790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656b8dba6d00d15ce8eaa1cbd9352e96190ffe4713310e0695b1457708534473. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8022200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bb1aac7d0494d53b6a54f72a07c06fe2944a650b6b723677bb04625b135a32. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8022000260.
No s'apaguen les estreles (BSO La mort de Guillem)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ccf84d3af8cef1c942526dd06e9aa11a459721b0441d6cd2a00cb5290b3075. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES90S1700304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe864315b8ca1800f4599097b0b9a26cf57563163e663da75660b702396a24c63. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5062200805.