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 0x4243f6bc5e37b731c9e1a690527dc352de1bd710b1bea2148ec01fd7ba5a3744. 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/7979f93b-2e0b-4c23-81c8-84eedac70cba.json and https://artists.proofprofile.net/proofs/artist/7979f93b-2e0b-4c23-81c8-84eedac70cba.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 0x3945a1209cce42062b2e6316b845331cacfca545203b87db84cfb4073759df97. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR96X2074879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e874ed6e967f685bbefd9eb401940c9416d1d35fb6fdaea21c568327e3653d9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR96X2071007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c46b0691a08222d42bd90e2eb6e90842702b9554a9e59d76134affb2386846c. 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/FR96X2074875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1656d250216575444cda0b833f2e51ad68254599c82dd2fcbaecb25063435f. 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/FRX201966683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc313972b7b4c0cbc4c2d8c5388cea51f92bf7a8ba767dc721f6d948d2145f6a2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRX201966686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff8e7f5ef421df4ff99305e3365b203b3b58b89057be2eb69d852665b97983a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:54:04Z), 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/QZYHM2409140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d1c8549fc1fd5ee88a47a50c0787f33923003a94290d92d94ca194dd6a40a8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX201966690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c216d227c1ca7cb5ed7cb2862c05852cb2a3f784d33edcf27010e3bb1f27ce. 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/FRX201966692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394c12364d4300e3536303328c0c4f344ada5465e40842e545ac2243730e82d4. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/FRX201966691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaaf85c61338f19864a266e552b9cc718592a8662d07c61c171611e7a35db07a. 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/FRX201966689.