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 0xf12cd5ae12f2d702fb94d4e407be941bef3338219f82134160ac036d113f180b. 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/2ff79f1c-ff10-4911-8c24-c1bd6daf2fbf.json and https://artists.proofprofile.net/proofs/artist/2ff79f1c-ff10-4911-8c24-c1bd6daf2fbf.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 0x8ef160c814e87761ce73c0cab8f00e3108d0d07aa3bd740c346cc29376b5f94d. 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/TCJPR2250349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcf354d2eac42e118db61f50c947b70960255b58bd3d5a4c686ad9d6a6e94d8. 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/TCJPR2250376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697d202f5100fe5019eec9a098008db33507e08f731d17229c0b29003ca5fd49. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPS2263600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3c13fb969eb4f29b4e9cf2a5f5d23f3526d5a7e7a5dc3fb2097c47f07b7ab0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCJPU2216851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d270dbb467c8bfd41353efaae2bcb91a18bfde89f242ef7057a14424c59ebb. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCJPX2321385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5e5a9c1a68ac37618059e0116df22b478985d3d03a66cb1e803c94a15497bf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPX2362380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bd5ed33f4a18468bbc74c8e7530f2040bf02388ff11a4120fe97611ab441a2. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCJPY2340935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582ded1587f73551199e04bf02e5eb45df1a085763004303291a7d8bc265d4af. 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/TCJPZ2489323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4047d2f9a7fd6fdee2f2d40d8173bb682631cf7fab98584f81a18d64058b84. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPZ2497615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9fab940b335cb95f8baae7e0502bbd1aa873950199f261a8dd96eb1abe6684. 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/TCJPB2442984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b9875b760bf905c2f09cd090c456a47af9d341accad158e2a023e8e39e4250. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCJPB2442992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5180a561ac13c6512e8816abc052b367740fa30a67ef61cbc5fb9f07a15926d. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/TCJPB2499831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6742e550d9b9b7344c3c63f1963f064458ff6686f4116aca7ce5eefcff4cc544. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPD2582597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c485a94fea121b827250d2455d78429f141aa9497353cb38bd04f07e9e4a5a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPH2525753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc723e6e3226a7c93f959d081ddeb868262d813d0b9b7a4dd1c8ec3d421dcb05. 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/TCJPH2525764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c485a94fea121b827250d2455d78429f141aa9497353cb38bd04f07e9e4a5a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCJPH2525753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6742e550d9b9b7344c3c63f1963f064458ff6686f4116aca7ce5eefcff4cc544. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCJPD2582597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc723e6e3226a7c93f959d081ddeb868262d813d0b9b7a4dd1c8ec3d421dcb05. 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/TCJPH2525764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a7bfcf21eb7cc78ab4d81a84315c597acdc665fb4fa0d758190caf0a5b7212. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT66J2557989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c6d80ac2fe911409dee056d66a1ce1bbe3c3b9afecfe00dd1225fcb90e77e9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCJPX2311214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a19ecda3443ae189bf9a08ce9a41d74222eeee77bd7ac6abf5143a433804c7. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/TCJPZ2463531.