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 0x6833a3595f82e8d129ddeb8bbe09a990239623d1a51e8a60b9cda955bca41607. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1dbd008f-5613-449d-a5d9-5327e03dabbc.json and https://artists.proofprofile.net/proofs/artist/1dbd008f-5613-449d-a5d9-5327e03dabbc.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 0x93626f634442ae044d0bdb561373a3813a7442cc87ccade2e0583cb0e3b2f6b1. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/GXD7V2513615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1543797eddf7bfd40e8e9214813a3bbf7ed6f8ec729057f86a430c5ce8a6e521. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GXD7V2569122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8df9846d9f8a3367d64dac47e1535294dcd14031e06703354fe6808ca7a00f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GXD7V2576245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6644f169519be15f69dab933d0d406390c4acb66127170f18f3d2134fe1d7f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GXD7V2503608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9384aff326ac241bdba837142d79beef6f16dec0d951d060235af336803eca0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GXD7V2559349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70af3e36150ef1845abed828a6da59c917bbcf28f2ac27424ca7ab7d2df7c06f. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/GXD7V2591288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85349f986dc24dc045b87f6337b86ab54df4e234173d5422d83aef4667e1dfa. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/GXD7V2515348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f90d70cf6853818f390ee8bbb45f82e628f3c5007b5932e52c0545abae4c47. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXD7V2548746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa415bf06fc48804d7d252f8fcb1bc79110241a899d868d0114728a5683b3791d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GXD7V2534967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f5597595ca81fb3c940361361031d4ca2581ea755616f3116c1824df7d9002. 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/GXD7V2521792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f58070d8f26cdc87350e9e035f746ee283ffd935c50b0c62a1dc9da1574826. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GXD7V2573448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ff1ec1762ca9f71a7b35b5930d9e38ee91c582c12068b6019f9de308a483cb. 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/GXD7V2569721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4266f7597bc06e9b441900db37c78fdb6093f587bd67fba125bb43b9aa93d4. 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/GXD7V2584879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cab63eabf62a3bf5ca759237a3f994467c0ed39485c107ac5fca947992ee10f. 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/GXD7V2517951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dfebc21c057c4f8781445a089b5a807c87049bbaf8f48b80168032c9232c6e. 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/GXD7V2584810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48bdb32910be2612d1afc12520fb76851ad87f076fd5555c5637e858ecec2a7. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GXD7V2565079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcded13445d223edae9e5ac8af0a37fca68c40b95cb22e2f09c8412f338997a33. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GXD7G2527447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9735225677120592e782c1487e946fb784ed6fb3fe6f8e7a5b592088a63b38. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GXD7G2542791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd651b97d0373be64da723afce02312c978f2b766d708ee48eab4b18aaa9d393b. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GXD7G2516702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab67c75460c32f996256c5de38c9cdcfae4a18814076439c26e078f4dea6eb5. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GXD7G2563288.