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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d843073be821a625583215e46ad72ec99dac96634b1fefd87de68e0426f059. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2b6dcbc-6cc5-4c19-94b3-6410435ae6eb.json and https://artists.proofprofile.net/proofs/artist/f2b6dcbc-6cc5-4c19-94b3-6410435ae6eb.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b8a6cddbf0a32b43e445d7b911b5e0192822e0d5955038bd7c123ef5cacc2c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE4RG1929303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28a3efde1f1ac4c0fea2d4dca46dbf58086e26656a5453f33f62b98b97dc869. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/SE4RG1929301.
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 0xc3cb1cc65cbb34503dd0ce5c8e82c191239d8f4a8c225a64647522d1f995a16e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SE4RG1929302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb20e863b3d2a833ca206d249d2cb35b7e67c8c620a62170f62b95a6d4557a3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/SE4RG1929304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8166781a28d95c86e56db96222b9c93c9f21c60cec91b3fbb0ebb29f5cbda4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE4RG1928002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2346fb34a48d1eb2133697b984a7f0693aa2f9442c04ae2ea8c31b0c82fd33. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE4RG1928004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4eda68c051d4fda6fd67efb07a3cf6b8536319cbe44f86f4d0bae8ae1111d1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SE4RG1928001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca726a55efe65f893ec5bac3a124fe259e6d13ade322b5dfe808950a70ab21e9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SE4RG1928003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc674fb9b5719ad36883e08483643c57e743934179131c1721afc85f9862be61. 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/SE4RG1817701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775aaccbc519ffbdaa7ca5cd7f794cd529d3c5414efb7b69290e594a49d9b566. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/SE4RG1817702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379a5215e11de2679b90a2ceae2bfbc9741e7d7936c867cafec5ecddbee3f3fb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE4RG1817703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8417cfa47b76a53fcef457c82b73bfc02f482cf5bcbd8a9e9b7a5b107637d7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SE4RG1817704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026f13082d21578eb2b91c452acb82229c3c169cc56325ee446945d37110b4ab. 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/SE4RG1817502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb651580abb2671b2ae1d7870af39121b03b7820b1142fb43d93bdad90627f763. 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/SE4RG1817503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1ae5328c33e01009ab69aab7b283bb21c6d96850b81f7f49e621228297bd75. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/SE4RG1817501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4e74bab3ac2cbb27a61dd3de76c1126954108e4f8bd2e904cd100e3af1e2e2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE4RG1817504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a733802767c9085d22b9a934fa3557572e516679b7438cda0a6e41707a3be58. 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/SE4RG1817101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3513ffe6e89f34806c2fda234fba658edd6854dea6bb88ddf13669edc68fcb8f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE4RG1817102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70bf6b8431481c2b2f25d1c2160b8462eb191ca4378bfda0fb3c8d082491557. 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/SE4RG1817103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeaa5c14158a6182ba86b2cbb8df705534ac244ee6a1639d2bce229f5b3fa56. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SE4RG1817104.