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 0x1ef4912b072d562d8748aa9b8daa74277235d5181e8b8e2463784559cb129cce. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08643862-332b-4779-8860-d1592e05f5cc.json and https://artists.proofprofile.net/proofs/artist/08643862-332b-4779-8860-d1592e05f5cc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Candomblé Angola & Caboclo (Edição Bahia) (Vol.2)
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 0x3b071c409b93f6cef1816439491323a984d6061c455a2681ed92ad7b7a2cc88e. 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/BR33T1900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb932c31b63d66b235b0b15d655183e56b45a5c45205995c1eb02dc2f7aa80ab. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BR33T1900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f0903b2cc813d137cd5d69a3fb3a3b74d9d9d7156914efd9d2b691f2b36ac0. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/BR33T1900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217a1beaaacdd9336d00a079d0aaeb0822716368f27826eabd498a174e785fe0. 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/BR33T1900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8f39bb34a4ad47aa5f9c2b9fa92187c4fe741d6f660f2535e62b2215e1e0f7. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BR33T1900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcdda4c23d362c5df98c1132002998fd5dbe8d51197e23c553be014eb21a730. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BR33T1900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392021b09c0b852a2eae67f23f1ce3c520f4a80a780483b8d3791d57e601f87f. 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/BR33T1900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c7780bda983b4a30fe64fbadc715021adef0ed1b6aabe2d0f42b463b0a3603. 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/BR33T1900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fd111ffe6aae1d8528aa416c4302b61b38fdba68a2f8b3708e22e6b1674c18. 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/BR33T1900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb4afcdc255009ee3dc72023008d7d7bae1f367849a4625328f9305a98528b6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BR33T1900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f6a7913d922ea547dbd12945a5ff94b56dec746705b45636a565c1bd5d1f78. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/BR33T1900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778e8352d361e8a5e13cb8e5920ad731a32bbd4b9cf80244324037ba0cde1440. 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/BR33T1900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec22284e4a61b8277e81ddaffc4ca01d197da1fb76f4597bdc4a5b69bd84d84. 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/BR33T1900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dba3a30eb4440871c9935bd66cce00e983ddfeb2f223835ef7c7599ef91062. 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/BR33T1900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c3479c1b9aae9f49da8244b69cc982209da4a8342040c367168e3228c34363. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BR33T1900069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5c3846c0b9024657f5b6003766f91a11182fd1ad04d9b06c670582b3cf60c5. 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/BR33T1900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e436edda7ee9cc9c92ffe4b3111d5214e24eac407901eb6c09b0e4099f0ff48. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BR33T1900071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad628b09f5ae08773891953a1f575128ef4ac089266581a016891352ee80e2ff. 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/BR33T1900072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d25b280a19135cce12899a9c320a8f78854d500b49d4d6b7d1b2edb30254ec. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/BR33T1900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41db37037a0aa91147046c69d2a3b1f0f491b2f7f2b41e7dc9b2eb78d5a3e1cb. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BR33T1900074.