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 0x2bd01b8ebc0a8b519cde704437346ff7ac99e53c237a654ae4084615ca04c054. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43246d29-b553-40b9-952f-361e4fcf069e.json and https://artists.proofprofile.net/proofs/artist/43246d29-b553-40b9-952f-361e4fcf069e.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 0xad7440c2fe7e7bc8d5d7a3d96c1d563fd26d748498091540342aea5e410b70d2. 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/HRA042400196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068bbbe6926b0a5042d10b7b0ab1117cc43e470286f2a13e3e59fcb404553098. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/HRA042401230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4db09d80ce3faa19a0dae4c62d173d2f69d3e64d669fb09263eb64da3d5c5c. 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/HRA042401381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e03e63204bef520dea120b15565f85e60eaf86e26ba798586ad80b37a58724. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/HRA042401655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0e8683964d6b938535bca9c7f231ff3ec035ab0331dcc0295aaaf0b772ef62. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/HRA042401380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0e8683964d6b938535bca9c7f231ff3ec035ab0331dcc0295aaaf0b772ef62. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/HRA042401380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7440c2fe7e7bc8d5d7a3d96c1d563fd26d748498091540342aea5e410b70d2. 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/HRA042400196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d2609ef081866a36586e0a74ac084c83556343ea0425d64bf6294f87cb70d6. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/HRA042301555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c5ae0a182e5242755ef02b54db19d072f8442f87bbb69d89d40586d66fb405. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/HRA042392079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc578b3c73c43d715c3bb43191feb5dfca04a046cab631dc802019f48069dd5c4. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/HRA042400393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068bbbe6926b0a5042d10b7b0ab1117cc43e470286f2a13e3e59fcb404553098. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/HRA042401230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a49a50cc2daa90be9edae174d9e4102c954d7dc74ae9f5e2a8d187c35c17590. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/HRA042401383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5742d0c199a0cc622b863136b42628acc8a4f4f7c5c608d43337370ea585aa. 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/HRA042202157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e58f31a409439ff491cb977e57de1fd53d87c253b06c5d46b76dfccc8cf69d. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/HRA042500855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae768733b6817d551370f96ca37f7ec88030fb6f8d83eda846ce39938869e11. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/HRA042501364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068bbbe6926b0a5042d10b7b0ab1117cc43e470286f2a13e3e59fcb404553098. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/HRA042401230.