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 0xa1b7f24126c7c0d1d89107ce1f2de19fc3075794e214c1d2493c435599c91a1b. 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/790c65e3-0b00-4f62-847f-6e3154a6b62d.json and https://artists.proofprofile.net/proofs/artist/790c65e3-0b00-4f62-847f-6e3154a6b62d.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 0x252b38d6f86c4193b94c512736cfe392c40962b5f1217a55afdf591f586032bc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:36Z), 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/QZRP42253027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e05fde989a54570d4b00a5f7ed5a538a6b636dca0a5c9fb0aac31ccb6e3abf. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZFZ22313862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d6c1a00ba325b5941cf62e84a20c8ae32438ef5a358fc56647ec7f98b72a49. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:40:56Z), 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/QZHN32345784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af21c6f8c41562c7853ddea37f3bf7bdf3f4583a11637176daff378fdd1d961. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZK6G2341363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50c405e93bf92ff7b01339ac4a7294dc56419c435a851c5e82d02a8e614ef78. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:47:18Z), 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/QZTAW2346298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794accfa72c45c09506e26864b9eb5c130bcef49751786404a778bff3a89d12d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:53:45Z), 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/QZHN42402538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794accfa72c45c09506e26864b9eb5c130bcef49751786404a778bff3a89d12d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZHN42402538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50c405e93bf92ff7b01339ac4a7294dc56419c435a851c5e82d02a8e614ef78. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:08:07Z), 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/QZTAW2346298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00332b6732e511f2be35a12d8eece741c41e6adc7c06cec31de2d419f03ea66a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6P2552591.