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 0x6ed3d3e8ec099a45038cce0bbe5b94c02e0838a3d0f4ad81b87956d66be5333f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb60c85a-33b4-4716-936e-7e0601e968a2.json and https://artists.proofprofile.net/proofs/artist/eb60c85a-33b4-4716-936e-7e0601e968a2.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 0x719b8ad462a15d12db346a5f790378859f25651d07ee082564c0e428e18202a7. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:58:44Z), 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/TCACK1549580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b58c0e355dc83574ece6815dd8f1949ccde9cf6c4a7100b7f4742573e7e9b1c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCACK1549636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7599072c167dc92113860c1b9ff394a1b1c18de51d5e6db71de1ae7acd7bdd5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCACK1549649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc1152e83c1e0f8d4ebe7f0f1e46974e4b2c4c9638ba8a7e5e83351834848cc. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/TCACM1674884.
33dC Praise: Ven, Es Tiempo de Adorarle (Alabanza y Adoración)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2acf7d1ddc4efa93b8f2b19144c4fefd44b07d49d711be38b05b477ee259d2d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCACM1675228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c9755f144fe37c49aaa57260f3818d8e177a47a03f477cbafd0b160f091551. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCACM1675229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26c3b61b264ceca0b50b64f8cdfd75f930acd3da156ab643eae35f81f416a8b. 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/TCACH1543073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e921a9bbbdc59dfaa6f27bbb5153cf87ed2593eb0c4539a3913d8b0c837bbc9. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:57:41Z), 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/TCACH1543075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f59506c2dd8af95a6fb06ac2d18aaa28b73b59262f6847bd4954a6d94033cf. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:45:56Z), 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/TCACH1543079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd728156a808554e9d6cedc931365b1a2f78655488beb67a9db2ab332ab86f8ac. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:24:44Z), 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/TCACH1543301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4f23d64a7d38f70ffd85604fa1a65bd394d6a5b39e5946356c20e5b861eede. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCACH1543304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1835cc98508a6f1d9a9d3be6e51fc6314caa411d646e5dbc92c7f29078fc9d08. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACH1543305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5ad5158cd0544e792a647f33707e645d1b2ce8421d6195222b054e64a8c56c. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:43:10Z), 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/TCACH1543306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975f407f34117709189500f37a4b9a0c4409ccb9d9ffb0aacdfc6aef666ffb7e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZN882303566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebd2ead694f499887f2ae19f0fbdca636b1bffe850a85dbf6d3c674ca6fd8b1. 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/USL4Q0819827.