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 0x34226e38766ed4055a19c7119123f0811ae13f9861826e3a43f9aef6859365a9. 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/0f27945d-ab70-4b5a-adf3-fba8fdfb3262.json and https://artists.proofprofile.net/proofs/artist/0f27945d-ab70-4b5a-adf3-fba8fdfb3262.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 0x31f754e2f710e0b9c572a223506669fdb638e78f3a6dc33264dfe185ffcfc1fa. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ES5151900399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2539c066812e33c49fc8aee030bf98c04cc869dfd4bc1f07db226f36bff73f10. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES5151900400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc8acb266e9c99b401baead191e4d0e4d129117f34a38e5b23a1fad4524362e. 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/ES5151900401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5baccc09c0091298296b7bdc15ea91c76b5b3b95e15830499842dfa6bee0d8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES5151900402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e9b7e09a25b7e0d04074a07cc0b6474d003d2330a4742a79802aa48e989c0f. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/ES5151900403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9257e7e75d464673e7908faea721093d512ee4d2d7e58b276312c44b560cc6ce. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ES5151900404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5954d3069b36791ec915bd8907958b840e90f973426caa58dc3a02cb9fcd9544. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES17D2001215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff316438113cb732b3ef245ba13662c0a465c9cb01096e6435ee9db9f6f0ad1. 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/USA2P2109081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2eabbd702921725eebbfcd6fbf34f0dd898607e58bf25fefa23610a2d9ccb35. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USA2P2112337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2eabbd702921725eebbfcd6fbf34f0dd898607e58bf25fefa23610a2d9ccb35. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/USA2P2112337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff316438113cb732b3ef245ba13662c0a465c9cb01096e6435ee9db9f6f0ad1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2109081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dd74557b83829dae32d4731a1a7603057595f8b35e2e4b9a7ee5e6d74a9afd. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA2P2112335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5954d3069b36791ec915bd8907958b840e90f973426caa58dc3a02cb9fcd9544. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES17D2001215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9147e27d8fbd296fb3253c1b8e9c33928a2ed8c764bdd7e551b0352ec5a140f. 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/USA2P2112338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a5bfe106cd22c57cc05d29b05e10e8d51c6872c797aa87f7f0af09b6a9a613. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA2P2112334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0273cafbaee3ff20e1dcde63f873880a97fb91eef537356af274056e8b210202. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES5152000327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf47ace8d98643d4ffa02fe4697d3386ad11f6044d26be6fceda09533457f162. 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/USA2P2470168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf5f0cd36ab84ebc2db83fe56c1d3b497269eab027469903641d45d0fbba143. 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/USA2P2440364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7852443dce35685c81eb88fdd6a22c3057e85737a12e8d494372f3d777a5313. 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/USA2P2451373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cd2df83e969b789c3388086e3ecd571776620a402541c0b5dcce744e2b6277. 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/USA2P2470169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df668fa281da75c0e502edf33bc642f23ea24e327df854cc050b292c3c813f0. 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/USA2P2470170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016bc48377e6fdbf1a49fef4f6cd77fc9d06c76cd10117b8f7b3f4854f3f2643. 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/USA2P2466527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bf2224f680e30d8b0643da872a987d8fd5dd6d11ef1647858a7b7429365fb8. 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/USA2P2435292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a924efa45f9303667adc980c2569b4b2b6fac039f5b2beeeb419e55ecba7764. 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/USA2P2470171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fd145a140b08ec943f2a9e36e898a8b44708b8d755f3f5a46f651fc86b7de4. 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/USA2P2458986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc704cb915762e8f238db75a7e6a55101165573b67c629dbe6da6df7e480eb9. 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/USA2P2470172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a41b6fc3d5f0aad8bbd22875f719f95cd6dc6ea88938da28163f36928868bdd. 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/USA2P2461554.
Després D'un Temps de Bona Relació, un Dia Vaig Anar a Sa Casa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ec7acd3b9ec186b39bf17f6a0a5049ee22b75f94fd1d3bf852ec08dce95a04. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES5062201101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf022aa6d8dfc27c4554f5d80d2cc072c66444e233f726d913466a4ca68299aab. 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/ES80A2218101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ec7acd3b9ec186b39bf17f6a0a5049ee22b75f94fd1d3bf852ec08dce95a04. 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/ES5062201101.