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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd6d6c11b6ae4860a819b4e125dc23768e37f773fcbd844658b9d47bf6b7f26. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54cc2c8a-c693-40df-846e-40646e65aeb5.json and https://artists.proofprofile.net/proofs/artist/54cc2c8a-c693-40df-846e-40646e65aeb5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Viva Portugal. O Grande Disco do Fado, Vol. 1
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87add3e725c99add3ba0390e363d2b21724d05f4c18f52388731ec22b201c415. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PTES19704201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6abb6b288e92ba4018122720f853eee7b5665f173525a3e55ec7dff0deceb67. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PTES19704216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cd3865ef5600103e28b89602e635a8119edf7e881a2795ee12ce3c4e82908d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R1771203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43811a60450d3d525439eea49c4c96598ac2ec0ec8ddacd6c1eb0b8a70b55cf0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR59R1771204.
O Melhor de Sempre (Êxitos de Sempre de José Crispim)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e014895cf6f399652c1d04b03bf3b559490ac2d953f1423fffb333537feb682. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR59R1779221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1004171db08d1f2899bcb5c20d3f5c19ace9243cb41c7ef5383ca485add513f6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR59R1779220.
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 0x2408c73fb20bafd789193fb37312787925ae114cb2d465c30df7c2699acbe2b0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR59R1779224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526a222ea411a5f7db32bb70a41364ad3fb4efa10a92b3b76ad0fc86604fc294. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FR59R1779226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82bad0c2c7f21306e347d59375251f5a7d202654e2b54c3b39549029a858fc8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R1760333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c95aa84d3e645945231b9e3c7a52c73b5e5417c51b5a0feb6623a91b9469f8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR59R1760335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fd492b3dd262a92eea3324f125e50f5413d3e957d058c58f65b5ed8a79bf50. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FR59R1760339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9766b796e8d174ea631750844ecd6d415ce0e905afba4943e1a76fef0b08e7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PTES10003702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040633ded264c96fb6993a874dbdb4a384dffbcbbb296afa62c0a1ae8425d6d4. 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/PTES10003710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909837cad1695b53efa81c133bb5a05d31d3d64315822bc2209ff9c3894469a3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PTES19602101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff295ce5f1a848e39fb8eebacf4d08a054987c712236af4fa7d0b6d8bc875988. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PTES19602105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b87f1685e07716e04ce12cbf898542de4448d410c6572a39ff9d8464787394. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/PTES19602103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e06bb938e76703f2774251aa08176020aa5a5c67e65978b5f0ccb9178ea9d5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/PTES19602108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde06f312a1fa0f0e4f269ad60e849c8acaa468b6cc6fce9cfe1cd3989da1449b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PTES18500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8def4a61705caff674e29fd32b907571ccdea2fc8f1e68d15480a73107e9655e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PTES18500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4335502b9c3ade45cdb447d2757fc49821b81a4ff628a7a767b2da1cdd6c6f91. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PTES19304702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ebb5bc22027a1b4b33f0c891a218fc16e00a251df4fac311bccad868a5b137. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PTES19304705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c412e5d25c6727ca2000a75fc64f04b3c5a6d24ec535e34ab8b341ee36d98ae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PTES19500910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3463fb1d2d2086b314d0e38fb2ce928f8858264447dc59830d3e4ad5ac24b64. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/PTES19500901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c92effe43e49a895d48211a6ec2000cff101ce81403168e4fc9e80a7a7bccdd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PTES18400304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c9bd169d31a452e79b0689a28404d254e4356bb32713b8463ac8a047ecd2b3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PTES18400305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d7b1e5543d13bd6ee5ad056b8c089d0ff3cbf2b93c581429e2cf1306914d96. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PTES18400308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5db29f5ef07d0a1ffde4a3bc0e7ca5c621f5349c9511fa3af947568b8535d85. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/PTES18400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f45186dd4a06b27f1d7174c820869c5addf2e16d4ede0a5acaf1ff91d603a6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PTES18400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313a4878470cb2fd071020541b38d069285b1e7c3ed8927be3b20124068029b2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/PTES18400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9562fde87dd5738aadc4bf74c5e1eb8ba990a0330b2d849fd360cec25dd1021. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/PTES18400410.
Rancho Folclórico Divino Salvador de Delães
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf508663cb50f04d5918a346ea02555ef2524cfbe64cf66fb6e1c4273b6ba863d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR96X1523529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155035341dfa1605813cbdeca88e8b57cc7456efdf9490051c0ffecc1bf5c74d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR96X1523534.