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 0x313623ace424d09cae76d06d97fb403116840722a1d854efe9f95f4f2c850961. 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/6ab31eed-91a5-40d7-9b87-911f36a238b1.json and https://artists.proofprofile.net/proofs/artist/6ab31eed-91a5-40d7-9b87-911f36a238b1.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 0x7f9fc94aedfb82b015330287446f9954d8dd70ab722de3710a9b04ce27e1b62f. 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/FRX872408036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a55dc0260ff74abb78c14399e11695e81fd8b416f38513940c838dbee5d8ad. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2483257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d719d6b7f9a6d966e921a39fc9abfd4654a8481c3ce29a32481df56d38ade6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2426412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6fe122a1256f81362bf33eb14fd9a6d0289eb6fe727164907135b60c83a95f. 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/MXA1L2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601a74fc84037e0983b5e7fa1ee9a54b75eba1a7ca8ac4214439fbffd9902241. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAHX2445881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3b0e836684ae48d63ef8f802511e64f5f3a8d018e96afc98abaf9864af6347. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2314857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1bea890df566da9fd706662c18ba49c8990023dbb7a4242e32f6c4b6f30724. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFC2011893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbdab2e6a893cbef367fea2c1c3b0920e43aff1277d3db9148a2bf47ea4f46b. 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/USA2P2234587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54786f2175b9ccd6ab65fbb28935e3c48246479739248a6b99e2ef5192bc9295. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5AB1977123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f80943f310216cd5cacde2b6b1bdb36ffe40e157e2cf514a2fed1d0be4425d8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMZ92395025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2063bcae0e35ad96994d3f483da9f638ffcbf656de52ad6a6cbe7f6d0742d8. 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/ARIXB2205968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbdab2e6a893cbef367fea2c1c3b0920e43aff1277d3db9148a2bf47ea4f46b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2234587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d86e14c5cac10245f3014b6445f529046ecbf0e265af13df8ffc0ff00571304. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2421231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfeac2d7945c4ad40e15720ad1ad0973d43263f51e4c4a3d895694046173023. 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/QZNJW2470623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71eb74b2dcfbb7694c25c64ee49333ec877b7c42913b304de8354044a2727906. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBSMU7396205.