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 0x2727fe3bbdb3814c576b725bfca865cca510c0fdc5732855fec42c9dd54958d3. 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/ff605379-969b-4af5-afb6-d0665d19f3d0.json and https://artists.proofprofile.net/proofs/artist/ff605379-969b-4af5-afb6-d0665d19f3d0.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 0xbb8db4bf29faf3805d8fd3f69ece5d60c01439505c8a8b5533520acac861c6e9. 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/NLRD52257068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94849d46066b023d9879d28c62bfe5117285cbfb10b0adcde305bed5f4cb18f. 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/NLRD52257062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc265e538dd2915471d4186b9cec02fb33ed6f5241d9c15c07097eaaf585defa9. 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/NLRD52042549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fe23e2264ff38c22ce34c09fe1902d7b5060fce73f5f8649d06d71a591d0d3. 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/NLRD52042551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1cfa470d6e09f77df93fea65da3c116b1aed6b70a8327f2e09f6c3395c9f1c. 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/NLRD52042552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be044ea9357cc384bcc81dd64b31b8aa83443f8697842e623a2abac80c7cc76. 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/NLRD52042553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4115fa3d75cb3d004362f32830b1352fa754a484fc4590850371fa372404ff94. 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/NLRD52257090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7a29ada1305b8204374dfa235b0c8b6d8fd28f1541f4589f08c7be6072c0e4. 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/NLRD52257087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a22c58e04c4a59e9c54c0f5b74d00b1d13ca62f19e04c33e7ff1433af032cd. 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/NLRD52257083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f64f06011424204964f76e97792f76aee256cfac9bb48d1cab3862091473c29. 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/NLRD52257078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b7b5c2907c3d21d3a594a8e299284bd227b821ecdfc7a3d320b5c907f35292. 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/NLRD52257067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35f5bcc21b2b6e8659206cf462ff6de70b92a3115e6a1e4311930706a2f4fb8. 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/NLRD52257069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb241b70de03a222201b12a10414c81dd7609137dfd78815aedd24182bcf16880. 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/NLRD52257070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b296f74b9e44e362e0121c925d8b4dfeb88cbf9e9d48a56e5abb92469b0b445. 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/NLRD52257071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d23fb60e6c6fd54e50d5789b010e712a20ae5b20d1de0c4158327a1614ac348. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:25:56Z), 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/NLRD52257064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba83401d9f2f2607062f13aa76ab55a139b147a230a071c0cf0d31a899e79918. 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/NLRD52257063.