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 0x42e3db08074ffa424147754ea13ccfa04ba9d04350e3d2617a05980f4e5d29ca. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d94c5bc3-5172-4a06-8ac0-1a4aeb5da51c.json and https://artists.proofprofile.net/proofs/artist/d94c5bc3-5172-4a06-8ac0-1a4aeb5da51c.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 0x46a4dd8f3ae586cd3c2d6417f6ccea91ca07da57ac8575c019f0cb891b4cb2b6. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZK6N2074084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1f6c3daa25c2e7e9f65ca4e5bce8892cc3359305eab0dc2a78579a9093e54b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FRX762192547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e71e79d7acf9c2e51bbd3f66d452d5ff8c97e5ef2dc6d28ee6067fa5aac617. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FRS182153171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ad7f8574bc716828352b402f45984a8e800c4f2a484ce2579618fe60d98648. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRS182153172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349b7db4635d14619eee0dc333298e58b0d5ca8f475fa1fb72e9cce1006b5cde. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DGA0Q2364880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4630701d6745ea09e70f6ea3ea676fbce8370edfee957e9f5794a432559a4e17. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA0M2425745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66ab641e3d1ab5e921fc7fe35932e8e23abfc7193eb4e04f5d4ee4c2ee0b248. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:24:26Z), 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/FR96X2488641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2000419a639bf8429fcac2008e35263fa525e2d07ee5e99ead68c3381b81ae51. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DGA0M2425751.