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 0x70c4e73300b20dca1c4bd2c03878c1e017f4f0073b3c644cac036c3b94eca68c. 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/650705b5-e7e7-4673-8819-bd148fcb0fe8.json and https://artists.proofprofile.net/proofs/artist/650705b5-e7e7-4673-8819-bd148fcb0fe8.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 0x03f47f27610db8053d58efe4a242ce7dcdaedce8e32bec1803b0f687bead0203. 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/FIWMA1800346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430e04e659e53cabf593b6dc5f43f47a047602e405c28bcf1461423e5b18d0d9. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/FIWMA1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23361e6f6ed9080888da7317e7e360cb125f74c6a4092d5547643b06ca1e988. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:36:31Z), 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/FIWMA2000129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d15ebe74264ed95c15275d2c3ab0190850632245a3cb032ea62edc85db82f5. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/FIWMA2000147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1604f7517d0fbb57abae944022194cfcade2e59c2feff690fb5aab183252147d. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:23:48Z), 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/FIWMA2000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe52a39ef65fc4878ca2933ffda8e32104e4f5c85ae77100644eb520ec0efa59. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FIWMA2000181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23361e6f6ed9080888da7317e7e360cb125f74c6a4092d5547643b06ca1e988. 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/FIWMA2000129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb76c5f1ec9416c2deb3a357986da089ba0f2bb282111ff791adceaa8291132. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FIWMA2200326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68713c9ae7b90f1694a175fc2821d3423117d3926322a31e4ac0c20392073e2. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/FIWMA2300399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bbea8b9cb6f6cbb8d55acb48bfd1d900b94b1d0d403c0cbd652e69634171a5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIWMA2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb59afe94c9a70c32adf8ca67d0328b6efea6c33595793a55b51f8649ccb8351. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIWMA2400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608beabb3d6b0f1b07b98c7c3d168be3953d9303ce49fc6d3afd2f4f4137f665. 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/FIWMA2500256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef0fadbccd6146e1c39d8a8a650a2ffabd63d92ab239e2a939626c864dca030. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/FIWMA2400271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d7e310992c992777284d99d614ada9a2124cf0c3a9ea75303f00627470916a. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FIWMA2500258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb59afe94c9a70c32adf8ca67d0328b6efea6c33595793a55b51f8649ccb8351. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FIWMA2400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d8957eab3d311c0abe2bc2253d504ba777e68165e6f23228aac7db180d2fc8. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FIWMA2500259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c2dff6d86e0ac8664de5d611e27922c37279aded1761e5d5a33f1962496707. 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/FIWMA2500260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d5ff3e732b18eecbf2c77c8632ab5acfe2f4803f811e470063d385b66c9f20. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FIWMA2400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1239a31181d89ab22d74fff6a7421fe1ebe3764e2eb1c08723b95ddc378bcca3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:22:56Z), 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/FIWMA2500261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e566cffc0eef4f827b3fc65e24375a10cc68f18f90e133614cb44bbde82e85. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FIWMA2500262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c1be4c98b85c05520af489819598580f583f6e462feea5efa6259c04480408. 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/FIBAR2200306.