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 0x7a38758d5b67e9d23e01108c670019054fee5367a163c0d27317bb64e49bc15f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4de37813-7f48-4b71-911a-989dba6ce842.json and https://artists.proofprofile.net/proofs/artist/4de37813-7f48-4b71-911a-989dba6ce842.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 0x344673daeb8ea40123c5cd611bb257e6af2329c4a3b17d1cba5143e915fc2837. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAIO2480438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b93bc4150e88589dcd244ad4b1c8db830cda68998d77abdc6bcb57be0a3911c. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:27:39Z), 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/TCAIO2480088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53bdc260bab2530076d36437ae3a30dbd3000063db2abdc7648eb615df382ac. 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/TCAIO2480014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803f09d7fa17e7c1f616c8239f5d25b72d2e2aa611e4e7dc9392f272fa78f487. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:59:27Z), 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/TCAIO2480598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7d9d865961543c7b79f1631948d260e6b3c7a1f8f36fdc1dd5e71eaad32d27. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJJ2592185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b34a8e19ab789dc43326beba12106942268547ea969cde35a3a2c1412ba8f9d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAJN2527540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdafaaf658179777ef494ec5c35b389cc77fd1953d1a1da228e270fc213c8c8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJN2527537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b674c0e9e012b881fb83939e60c3d8797686539bf7ce14ff66f4a5590fed24. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJN2527539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd42c2d08ce84b54bac3ab3bd12a834f2d8dfa778a369bfb7437bb19e7600e6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAJN2527542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d987e69e89d7defe3a03abc967c90f87e96cf55fb529388ac26ddb18c379c7. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:19:26Z), 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/TCAJN2527629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bff3453107aef0c429c3d6227c8163d4193863891807028dd41bf8453cbf95d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:27:58Z), 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/TCAJN2527543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d03166ef720e5cfcb8a096f15e70bad59fb97103e72578fb58e77a5e38b1ae. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:16:52Z), 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/TCAJN2527630.