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 0x656e86638d27138c7370293e59eb72022c21ccde208b3cb7bbed71c1fa819c63. 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/0bf9425a-6aff-4281-a223-4b26c787be90.json and https://artists.proofprofile.net/proofs/artist/0bf9425a-6aff-4281-a223-4b26c787be90.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 0xc513014f4d3a6701f8d55cf81191a122ff1c130986c23d11ad4a0a29938f25d2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:02:28Z), 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/QZES52042229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d16d576381fb10c88135a23ec4c26898e117a564e6e55ba33d95d07578c5227. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES52042230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c149fd84ce07d27217ccce8979e99a9a149244df381d50abe7b781807b12059. 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/QZES52042231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383946b85506cd290ce24422103bb6af205c10f13647eb860063ef08d397cd0d. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:40:22Z), 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/QZK6L2032939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873ba46b6a41c3c80a1d38a5db486d92e23d6becb0396693872db0a276b7b953. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES62133994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c236a34bdd08ab70756b65710dc6842013645c43b97d2790fbe67f68b3b386d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMER2100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cd3cc1080931b7aba35d1f42277c006c2d6a48f093f63b17e236f05549e281. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FR10S2351544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f91450d7ce402e3f0bb17634ac6862ed80c160b8689c3403a3c3be1c12fd44. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FR10S2351551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fec288ddfedf5f8bf58c73eedc6f24bc2b1d15bc755737edea020080ab33db. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:05:42Z), 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/FR10S2351552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009d4caad46a0a5ca199181eaa25052f94ec8f14eb79f37d6edaa80f3a2a5bf8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX282213038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f587fe9d868a5e98cefad96736bce69d6cf9674e843c0072684b18ed52b7eb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DGA0M2463305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29715ffa481d9f0930984647f59f8ea17881dbe5d1a2f9c99584745c0ae95f9a. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:35:46Z), 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/QZTPX2474614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cef3ea04820712e49c89bbb5103b750c907fb75632e3f12dce6301671bd1a85. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX282422619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff297d9bc74baa5509ee54470d78615ed02a0c1829b3e1492ced4152dcaee26. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:36:31Z), 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/QZW9M2414725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacd1c50f743077274a001a0f954c13d9cafbd2fb1e384b77832c8985037a8de. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:15Z), 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/US7VG2540260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd603644f48d92159c8297dc4c0225786ee7d1dd29bdde4597992b4a1fd716b25. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTPX2474615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f49d90153044dca6e148094e280f19d9d2b5e94972cb07a255e17cb2438b71. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJZ2522676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1299c96f07b1f44f3e21f571a104b4f325e41df1db521d480fad3cf09a0a13b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZPLR2220997.