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 0x4c824c149ac2af23375a744d398db40536162376aa760152e99aed1c10255583. 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/d654f7b0-68a8-4358-bdee-1035eb9c5bc7.json and https://artists.proofprofile.net/proofs/artist/d654f7b0-68a8-4358-bdee-1035eb9c5bc7.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 0x2db498c81e93eecb6a55ebb96fe6be4c6b0fa2dd40af9fc903629fb724aaf73c. 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/FRX762116066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096b49d1f11ee92ed0816431fc4966d83bda93a990aa01a91d9ed53fc314eab4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732421696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320f82919f10d254859e21bd17b16ce0cc6a284906f336eabd64636b4ace4d29. 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/FRX452204037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d37dc079a5de94235c9599690e6dd649341f614784ebe6e0331855cd98cd043. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX282267342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603096a1edc6ac6918b901bbc0df36dee683ff01b21aeead99086adb26290dcf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX202299034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278da6da0b89ee300c4ac1bf8d444505dbed71f94c9b14c611560b919ca1c232. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR59R2256955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5da4ef3eef52732ae735d5cc01c09597136286ced973a4e19c1a0999d93324. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR59R2227732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f57d65c3ecd801d3fb6deba16e60d654adfe614b9b7881d48f483fc88bb1aaa. 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/FRS182136378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa623fcb3ad13fc77c51283d01cc833603d9e34e2c1e51b42b03317b70fa7867c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX282594667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3691bcd75267a45678174c20faaf293da1bae50cc58ae623e51eda4d7f7aa9b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:54Z), 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/FRX282563510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c325bf639dce13c2939b6be7a89ea364a259700bce77742af6fe046ac6f3246. 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/FRX282537108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadfc1fcae78144ddfc3f12de26bb2d389d88af96121a8bfb4bb219c091d5451. 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/FRX282523452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b43b381bcd270626d4aa42293d94558ff0fc393f3564d1b15f32acc273ea9a. 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/FRX202593441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91411042f415420e87ec9e096e5038ab946756705022a6b37d362e0c21a10a9b. 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/FRX202539203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40166fa48bc331ce84eb0b380f6a7712f5993342a8bb1e4ceb7e96ee1e9ff5c9. 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/FR96X2598046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5d5d3ec354abc2048a31c086ab0a297ca5567056c73a6726d703b275bbb786. 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/FR96X2538094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0deb7da81d037c021188ea19c65460817eae1d4d09a11679e719d7541f965d9d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR96X2556286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c01e59a765ae203d557d9491a54e9f3bb443d796c456a5062225922683a0bb7. 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/FR59R2550281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97bd41501ab9ae36087972161c553ee59fea41c307490ec584b095f729842e2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX202538802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e8f00b1f6ddf2cbb635ab72637a7c0a44e1249fd01feb01b1c204570d9c7ba. 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/HKD012421692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b002b59aaa3610e2662dcb36c53e8e382b6afd82c4ba4f1747bc76d6d0223c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732486639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd262d7e50a5e8ffa8ca17c7c7b4ee30af002f4030c341add42d555c781586445. 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/FR96X2531978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6d45e8d68b03d13ae103306177d22ed53612005f6572e2b5a865c77388fb37. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732464312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2921da5c8b18489d817d2af9156b8a519a466cd06df58c7fd777771ce2b5ac7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKG732453013.