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 0x983372bc289ce16c5f7d47cd8cb5223cd6cd5e597a30c8b864be1a32d34a17a9. 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/1b2a65a4-e2fe-4cf0-921a-e11e6e09a45d.json and https://artists.proofprofile.net/proofs/artist/1b2a65a4-e2fe-4cf0-921a-e11e6e09a45d.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 0x5c913a0f3aeb62cf368617c13e36c12c6f8f8187d8356d02641e2139dc1b9363. 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/IL1012302143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80642fa1011d1b2d6ac8cc6cc55f854578335815e3e9ba77389f4441e0110d56. 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/IL1012400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca734ebeccd437f6915468876f872a94e99d44999681b646ffd786c27e8f5dc. 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/IL1012400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2861ae338325905a97f40524fcf1647cc54eecd83064f1f4e849a6f6990ba992. 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/IL1012400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff18d8918e561d04cb03ae075c1bc371ea1c653848730e6ffd28b85eab361223. 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/IL1012302026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a7bb476e396901aacb3464b9a18ad502d0fe33604e215c286a121e3513101b. 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/IL1012302028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad147a154948d24712535c69e730d82dee541c974788ca71bd521c395c830c58. 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/IL1012400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7db8620cad16ec4cf7d1b4fbe6670bdc5dc52fe7790e8ffafd6a86ea9fae1c. 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/IL1012400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1345642f2e714f0ece3dae6c07c5ec681d6f95d135c7004e0972fdf504c53619. 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/IL1012400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fec0201088c2e18a81c03764495cf11e96b178d55d8dcbc197d0f3346bcf25. 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/IL1012400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a0039806d0677f2b7a99b66c633a025fcd0623d74533f283bcf8ab4c433604. 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/IL1012400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3efb53a6b112fd9cdd50d7fb8f8f7bf2a665c921637e451e9cfc98a50c69ff5. 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/IL1012400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80455b96aef9b761aa43499daad50c7f296616222d1f58351bec5dba22b9d9a9. 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/IL1012400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39db70fb46f09550a41ca2da6835aa8e4e182e4b71e7bfffa2a40dcde6ddea56. 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/IL1012400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bac26f2bf93865ca0ecc601677f8a2fe041f3f0993360cdb8c4f614e3589af. 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/IL1012302190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9f713fbe6b48cb8841ff6a29a2438b25cb5ecf01e9521c1af064b524eb7551. 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/IL1012400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4b064ee9c8331cd71d9ba5cf6ca2c450319e4df7f945ddd79c78b9b263e704. 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/IL1012400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e715b22d5b2b75bbcf7d259fa832d64e2f9c297622b016c771556958feb535. 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/IL1012400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3360fb66e9345e50a6ce2b18712e9fed3f15154f08f6747903ec0eb92cc7aa. 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/IL1012302017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f1731244095b3341d6cab84f80ae2a57a276cf0574d43fdb87b01201075db4. 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/IL1012301942.