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 0x6007a5b5516910e3c6852598ffa53b2e16ea95a92623e1b709923a005d6df5c6. 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/685d65e9-c8d0-4484-b0c2-1fd425e34a10.json and https://artists.proofprofile.net/proofs/artist/685d65e9-c8d0-4484-b0c2-1fd425e34a10.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 0xc4d2afa84919fc1954e4176c23fbd1fa32deda3c9811521cbfddf7c00616ac36. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:10:34Z), 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/GB8KE2403995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29904f8b8b219557bb7f5e0eb97bd6fb31a4553579c1c033cb3dcc933cf21763. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:27:57Z), 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/DJIC32400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3abb488478bfd1a29d79be2c37a2472dd8f92ba426fbc29638294a0004557ef. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DJIC32400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e01773fa9da038dfac6d45a1a768edd4865917bcb642a49f624b71ba5b55c0. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DJIC32400212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee73d854daa0e85a28b0da593a274160db5e7c52f3dd12512ccb791cf045c5d3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USANG2458159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9e9eb0816566ef19a69c6f9eb9969718eace0ac65c143dd781abde758bfe16. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:50:45Z), 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/GXBAV2515315.
Depressed 2 (feat. Kourt, GRESI\/ & $WMP)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93faa37bac96f47396d1451f539407c7983186852f397202f2240cc7ff1edac. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:48:02Z), 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/ILTON2501180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba879c1938cc791349e11a57601347ab9b68e524a40bd2aa0180a36c02315d7. 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/US3DF2566646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdafcd6f2bd2192d976a95b98adcee072ecbc5a1eaba7bb30f279072f13249a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:41:19Z), 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/MXA3V2434442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cd569a7e7b68f0dd9e664a55e38a6907298efb21291497ab9ecc58bfd635da. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/MXA3V2434444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bafae508a5d2b7da83aa1c01bdcbcea8cc91c6737a1d80c3b3375744f66967. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:25:00Z), 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/US3DF2570163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf0c77fba486afc7a468346b398cdb233721e53e4d189cf08d3258a409ebfc6. 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/SGB502397178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243f3c110b4410cb7741c8c758364c0413d8d8c39a452a36b48e52eff0443bb3. 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/SGB502397177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137608a4d696ba8d1f8b12429eae24a33d08dd332ffe0fffa34b8f972af23f29. 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/SGB502397179.