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 0x6396745d5eeccff7353ea4eb876a183639b051b08219f9396fb5f2dc7d25aba5. 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/c3cfbb00-45b1-4230-a531-4dde34482e56.json and https://artists.proofprofile.net/proofs/artist/c3cfbb00-45b1-4230-a531-4dde34482e56.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 0xe01577621c121a48f4ff120bc0e71c881fb85f01407bbf2c7b01fe522d62c39f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLS762200473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78f823eb78c5d0772a297035e18375eeef99b52ac39e306c15fae910685b0c5. 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/NLS762400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07af0b79a89d999e37a57199c3fbcd7275d0b5c79f99f0c962410b919fe2e737. 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/NLS762300346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa981221354ca4e329e90d2c1ae38ca874b277cc6ef6e9aefb58894757f451bf1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLS762200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ef3c033194926016a39f1f7595d1c8f549ea72fe62b2b4f5b3c54040e7f645. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLS762400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d891c7c4d630ee02128cf24fd5835a14269b782b1890b62ceb60290fff6671d. 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/NLS762400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb15752a40c03adcd34aa78aed03a389fe11951dd10aff731c86d7574931542f. 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/NLS762400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2ddcc66015458caaf730c74bda13cd35583b556ef2586de9d0a62937684048. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLS762300799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ed01e1a66e3422d8386d1807b09eba2e316144e7b0a349cf0f34991029c861. 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/NLS762300466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7608d22a3d44e6700f46efbbbc4005c20d5931b21a1b85861d01666eb967ea7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLS762300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f6a1009f6d24d41269e60a0d5461b667715fec4cddf98cd119062b3093526e. 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/NLS762300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee5b184c6048c7e6185078f1f2dcd005378738684bfe6270e854b64e559b595. 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/NLS762300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b4ea6f8a362a5b5d3209e1fb23648cb35c4845b8e280b66545b9611065da06. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLS762200246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8446f588bc7b5cd3d4a14734abc147149a44544655662798fa9741c3539ff42. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLS762200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab62ca0e998c901b5e1528240e0521011542b3a94e5c3828b183021f5afe3f4c. 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/NLS762100513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3b29bed2cf4691356c6befedb3dd0dee8c5b14ad618034cad6dd2bb486c891. 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/NLS762100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b26665ba1e0dbaab76b5ff41cb9204a8217a0ae8dc536e1e27d9133cdcbc02. 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/NLS762000303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b596d42e2569b8ba69e9d19ec6f45dd6edd78d5c9e29ee9d84ea4d02791e93. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLS762000142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78f823eb78c5d0772a297035e18375eeef99b52ac39e306c15fae910685b0c5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLS762400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d0b4f3427f21e4869da81260a07b1ed34736c0e1da812e182229c143208640. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/NLS762300548.