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 0x3340076af6db9de45ed2a0eb3c3c63039bb45bbd4467b52b075d0f4763fa35ac. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce831ada-35a1-479a-aee0-a1b8090b79ae.json and https://artists.proofprofile.net/proofs/artist/ce831ada-35a1-479a-aee0-a1b8090b79ae.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 0xad638baf2a86ffb42298856b7486e86ff81f394bd12a31d3925045d000de34c0. 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/GBLFP2479572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d84581b1e32754210fa7bc7eb8c1f0860ad9e06c5749cb89a4b805c85744df. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBLFP2479573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6058e77cd80de05b997ee867a83a01964cfe0c2fb11b294c1bd48af4ffc4b4. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GBLFP2479574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123c65578e6924194149f86bd64f41a0e1c05a96213299a620fa918838a2e8d1. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GBLFP2479575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c31de7957ebff0bff6fb7b0af317ef8cb92ce030d4dcd242c3d4b8fe1fbbff5. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GBLFP2479576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8373a25501af7cc4bd0dd9f8c49f9a90ee75ef50cc8b85bfc98bbdaae4a9d54e. 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/GBLFP2479577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b961591b99a32eb7e9cd663820f3e8080cb644c1b3d77026e6dd93dd7425dd4. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/GBLFP2479578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a101a5a0ed5871e6b222f4f14ee98b1eacfd57f4c065cf1ee1b2594965c0d9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBLFP2479579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2dee737bf3867601b7c055c863472ce75fe5c50ffab9e4e3bd3aab9ccb85d8. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/GBLFP2479580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0902bdbf3774e2125d2693e6a425f3830735a3f5363109b339ce7cb4b02f78e. 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/GBLFP2479581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0115aca844e21a8e89ad543fb19d78843e5b3ae5a6717fd31413583441a800d. 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/GBLFP2479561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3ebf33023bae35786771621a27ba0eb336cf2a6947c0c38fd6abc38fdcb97d. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/GBLFP2479562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46a99b207efc747244a2bf51ddc84fa63659f6454d28cab8529ed114ce70419. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GBLFP2479563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3848a6299b25557374fc2a2c9cd716e2e6d21705428f5cb00a2f1bd2b7b359e7. 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/GBLFP2479564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa01b6c2e5db8fc6676bb2cc9495f49de49236f694811ca0d027d6d0ecf6bd8d. 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/GBLFP2479565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fee6a2dabf3402056cb0e89d6e642e6f8564909e41ad28827982ee03fc0a7f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBLFP2479566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032bf0de326e918e87c6a8ac7f3785360b37f4ca877a5fd6177578012a41815d. 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/GBLFP2479567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47aff3a033518b9d9e845c0dc1e10eafdef17cd9c343717fbb18a8c88166f0df. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBLFP2479568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a15f112540a8136fad8430b7dc6e32a4c13308c3576ff7b397c4f943d15f6c. 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/GBLFP2479569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4dcd575263dc700b219815f2f834b3ec804cb47e21551be08059e9c106943c. 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/GBLFP2479570.