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 0x5d512a439d5e34c9d0f127b563c3ac5e73b886d8799ea73ba796be65cb686c64. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9457e63-1ea6-426f-b525-962663539884.json and https://artists.proofprofile.net/proofs/artist/b9457e63-1ea6-426f-b525-962663539884.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 0x8c80106490ab604a8849b68e5a8715cdbf9239e02a49400f6fb25a71db6cd02f. 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/FI3MD2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7651a0c63575f9f90218fdc8ab0a1d63bf2d002f3f04688dd66bede2c14e5f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FI3MD2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8464f750aaa32dd13c30fa0c20103bf4ee24fb894190ba89a9febce9feb7fd9d. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/FI3MD2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edb11359b6dad179d340507a6833d5296d227ed6d523732636f4d8de73b9560. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FI3MD2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5bbf8cac91dbf91c4821f6517e7008dec57bf251bba14aef696e3b8c1d5174. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FI3MD2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8464f750aaa32dd13c30fa0c20103bf4ee24fb894190ba89a9febce9feb7fd9d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FI3MD2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edb11359b6dad179d340507a6833d5296d227ed6d523732636f4d8de73b9560. 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/FI3MD2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5bbf8cac91dbf91c4821f6517e7008dec57bf251bba14aef696e3b8c1d5174. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FI3MD2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d90e3eefe537f9ba7b2ccc3b13d516a767a6f93908ddd2755ea87f0aa6ee83. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:08:14Z), 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/FI3MD2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c77b4f11f98dc9e74738e7cff52ca8a62e1a05522142426809790d6fbbfd6f9. 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/FI3MD2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a97bc5ca58c09c2c9f4fdefb5d06a72f52b5dedc23f7725ac32e737a5bba927. 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/FI3MD2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c77b4f11f98dc9e74738e7cff52ca8a62e1a05522142426809790d6fbbfd6f9. 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/FI3MD2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d90e3eefe537f9ba7b2ccc3b13d516a767a6f93908ddd2755ea87f0aa6ee83. 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/FI3MD2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dee00cb2cefa838fda9e1a7bb479d94439d71ca8fed3948f15b04b36b0b687. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FI3MD2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6b1c779247547eaebde741b28d764b3aff6a9f66022d75c05e6504c3e5f7d9. 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/FI3MD2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f20efb04a36e4572d19475d1c8349c3e14dacd40fdd45715a55cfcad3be5a8. 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/FI3MD2500009.