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 0x21e78388754345180c863f295f963e09b652ad66f352c1cd3a127a02bdc56e06. 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/98bc4b2a-d158-45e1-af6f-9ba506e107f2.json and https://artists.proofprofile.net/proofs/artist/98bc4b2a-d158-45e1-af6f-9ba506e107f2.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 0x700864dd4cce0f1697ea3fef4ff2cbe1ba81952b8a507cf289d78cf8c1bc21b6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWT2012750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19065026d8e791d2622c7996c23957e252b0b7a7a0cd30b0fd43bce231be186. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEP2267793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fdfae5945ddf3eaddedf311e0c29d0b404269cfb4d6aae56d28a7cf127c682. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZK6M2223449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0435c646bffd32cfba64b101e26064344a3b7ef775b4759d1b4c6d16f2320c7f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZMEP2267797.
Gardening is a Practice, Not an Idea (Deluxe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dad857f99a466dc9742dbb627e6605dce6e79da63d8b9a49660936e92ec44be. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZRP52365106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0ec5ab6f29d724ed5b5e8c16e9505cf951b7872ab2341584dbe034cd042294. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZRP52365107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fa86f52443f3e0e64b4121bc9103dd51f4b08d2e86c1ce510e9e9a911c9b8e. 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/QZRP52365108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb4e121712583692197bea898655de7e1efa80b114cd70c9c01fcc5d06f1038. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZRP52365109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfede11fd24a24166316df13f931f7887892aba37459d5ea57c524ff89d3bc9c9. 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/QZRP52365110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb17a3e6e894ba281da1fce3e14e6e3b5f9047f49276368492105b029c8225b1. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/FR9Z62300874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6954db808f97d7766d13badc8c065802ed934d90947af84b18c4da1632c4ea60. 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/FR9Z62300873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6ba723d118bdd92516e039041077b1993f9a9ce921d27ed66a24fa38af0195. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZK6J2550505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b12131a663ba3d21ab7f76d97e6fd94b1c2a2682faa914da7061f524fc6c5e1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPLR2548413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6ba723d118bdd92516e039041077b1993f9a9ce921d27ed66a24fa38af0195. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6J2550505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d0ae8371091cf34def2427fad5029605a6bb0a77da45a0dd7f08cd49ac1387. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZPLR2548414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85ff7200b53df60b0c11c48b27dc0d7b6abd48e1d61dae51e90a69212c3f7d0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPLR2548415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919ef2461746f8afdcd6511d5986167422c298e3a886c0fe8dfe65648ece6622. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR9Z62400865.