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 0x8fdda64b91dc739a552491b0d4db7e87c07e60a5d1c3e1a787b2619a94db2c04. 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/18e3b045-6bd7-4de3-8a00-11dee076df01.json and https://artists.proofprofile.net/proofs/artist/18e3b045-6bd7-4de3-8a00-11dee076df01.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 0xd9dfa598e63c8ec80be5f1ffa8e5d64462513072b497ac567fa7d7c7f2a400d6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCHR1340945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc27858c1b6ed76b299e8784da59a908dd54fc5a570beb296d022f447af3c85. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USCHR1340946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3cc9953f0eddc73ec67ed83031b48004326445206b9d1dfacea4c31f0be9de. 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/USCHR1340949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bb8daf19f37951b8feaadb268cd8aa912d5b7cde58e68cd63079594a51d9bf. 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/USCHR1340950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58dd52958b4c09ea22f363886fc3bc678fc83078696ef46008a34ea2a82ccc8. 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/USCHR1340952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afdf1b21f7bf909da2c9fbde20fcfcdf996fd30a310ee007739ee8246fdc18b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCHR1347573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca34fa2482c487f44474ad173e16150afc16c202b3b24cfc8aa379252f0b6f2e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCHR1338903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f92404bcf6838ff81d7c9bcc5997cffa69a5324f28ff3dde8b8732fe5347b02. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USCHR1342143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56546c62edd0d8f0f3d2b5e68e51aded49a6561816f1840437fe4b10f02b34b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USCHR1339064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5750d7ed0494be8c445dfa89a0d5212597db0fa9768a8df88ce0fdec8d7b38. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USCHR1339747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc14e4b9b1083a552b3da41fe506d0f8e5693c6cedcd9edcfc8a010c5891172. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/USCHR1347563.
Fu Fu Fu (Hagamos Burbujas Contra el Coronavirus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163effd02b0aba35fb466c9214389538925ee3a598c81d6b049c3ed4bc41fcbc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZGLS2001557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb272e2cf4b6feb8551f8bd4f1e70f6f797441b5acc3d562a9b4d6fbf8a15e0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNJV2420091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0297fd98579d76b58b928241894c38af985035f4684e8a2561f9401839fa7ad. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMZ92452502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c62b2e69e875d318da219665953df6b9d4d5cb79119117b5a62fca8f80e5582. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZTPX2463407.