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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73dadee6a02949f5443295e8c97874b8df786b31525a26e75baa9e6010610fb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bf8ce30-35c0-42d2-8582-fa624dc9d7cd.json and https://artists.proofprofile.net/proofs/artist/2bf8ce30-35c0-42d2-8582-fa624dc9d7cd.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57f759390f7f28d0a4b058bab68b605c775db794ff502a99b90360833feed4e. 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/NZSG02000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8af4f4e6f3b9c5ed38cb4eeaeaa7309671dae41bd554b07b6d09c3917eb158. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NZSG02000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee200389baf8b8c223465ba265763f408009ecf4eefaf975a36d8a0f972d9a8f. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/NZSG02000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d024a027148af03711941ac483926e46fec8ec35c94aac50d5fab793d3fb60. 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/NZSG02000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf5303b470f6e343074e993f956cc0a030b3d29a6d939b3f4a6decdb1f88669. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NZSG02300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa00a727b073c704d087a56db06bfbb37c8917a4d2bb7d17a94f70db0b2fb12e. 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/NZSG02400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf220fd41bdc31467f6f702cd07bb07da72fa5d4e1aecd4bb875cc130cfffe45. 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/NZSG02300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d568a325e24e91ba119ef63e42b189b20ea59362666c19c2eb00fa1f923375. 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/NZSG02400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8204faea7bfe7c1403ff7c9a49831879cad077c5118bbfad5f4053efead4548a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NZSG02400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe054278b9e5b61f63776828e35d640ad20d07bf01652fadb937e9c3b3c667651. 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/NZSG02400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadadbdcb05a92b70c72af5f1a0d9852e034784e34ce1d84a19da9cbd21945799. 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/NZSG01900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb101cfa2f1a9b09b42b2f2bf2a4ad3380b48e16e434c32cec0de2c481985e8. 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/AUMEV2283741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522a52766cbac9802af1c2a633cfdaa1993099419fae04c701934fa88271e417. 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/AUMEV2283743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec93cedabb46e4190604a0bdd9414d756bf803880e8aa7ed62a456e2b424bf0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/AUMEV2283744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77001061c6cf3423c914571c8e062515807763c467d8d80144a3f7604c490214. 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/AUMEV2230969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734e31c90ded6770d463195f8ab33fb0587ead6ed0a6c27a596ee54b5e116f9a. 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/AUMEV2253902.