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 0x0515ccdea6cbbb579399348dbdf7f950b4339d7720da791f80eb83e0e95a080b. 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/98a6c01f-5f7b-46cc-9943-7bc4a54138a8.json and https://artists.proofprofile.net/proofs/artist/98a6c01f-5f7b-46cc-9943-7bc4a54138a8.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 0xab03bcecc162f5098ba914fb7605ed31bf35e457eb9f27cc6530d52621af5e5d. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/GBBKS1200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd667ee4c738a76e1d0f1742a9f40bc542564612bb16b5b57d4f4c2a4b6ce840d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBBKS1200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30a0bde3a60c0d86fc680310e2b647729f41f437a28f2661430c8496d26cf85. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GBBKS1300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0d194c8767e34bb43ec9c063a1e11de02e50a75e66fbb1d9a6cea270e0bc75. 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/GBBKS1300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079a97d3b76ed7de1cb6f353bf5c7b648a741f9da037623d6be423cae7339fba. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/GBBKS1300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30002e02c3d5b59e6c5f60c1fad63dc7e7aeed623c1561f53f8298ad13f6e12c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBBKS1300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe180f71192818f1d0b219e8ca876283eff5b8aa6400e05130ca3f3d5fb456254. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBBKS1300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cb6fa2e9bd9b56913ea23a092c1cbdbd3849ed49a1f8035b36988f05b8e117. 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/GBBKS1300158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c266043c59e3da7e6ff8a094ba3d23c1ef5847efadd22f5d12b50f5accc2e40. 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/GBBKS1300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c32d50c287ba09a480ccdeaf0ff8fab83c25b21f9b1c4ef9c39eddce8f6838. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBBKS1300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95fa61b9081ad76ff3b9e6d8a075c5d07a7c49da07c0bf6ee0815a70eaaf169. 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/GBBKS1200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079a97d3b76ed7de1cb6f353bf5c7b648a741f9da037623d6be423cae7339fba. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GBBKS1300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30002e02c3d5b59e6c5f60c1fad63dc7e7aeed623c1561f53f8298ad13f6e12c. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBBKS1300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf66bb98dea8723c7ac8355400b4d349de1ce05f4d4e81e27a6727ce1c4a70f. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBBKS1300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cb6fa2e9bd9b56913ea23a092c1cbdbd3849ed49a1f8035b36988f05b8e117. 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/GBBKS1300158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c32d50c287ba09a480ccdeaf0ff8fab83c25b21f9b1c4ef9c39eddce8f6838. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/GBBKS1300159.