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 0x1e7449152bd03562734b18cd707136d63b0ba4aaae5d314734e64392b7c6d6f1. 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/1bc1e617-e7e3-48d2-923a-3d4c24da5701.json and https://artists.proofprofile.net/proofs/artist/1bc1e617-e7e3-48d2-923a-3d4c24da5701.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
All Work, No Class (Acoustic) [Unplugged]
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 0xfd437083eb9b246a8019f7084dbb901919960c8e41f7fc0616645e221fb6b64d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ62156570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fb6bf335f4459b0911195a891f6dbea7da2e4255930a60cd84b1bec9ca01b7. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZHN52164704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9130518a996fc68e9fb66053e10de1459027480bbfe4bdaec71de43f6b45a59c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZMEM2351283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6a6607a958908165a2bbbbd4c8bffa6e3902e8e771efb69ede302d12a68ebb. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZFZ72252350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78de98026fe0bfe50be00d0497a4dceae30995c4eb281f18f82f5126a9be0d99. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZMEP2322919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbcb62cc3861a6ea373a02486515c191f3bbb9d2bd40218f2627633ef99ea7c. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZES92258045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe60d3fc3ee4fb5e3a904d6a97e32baf4fe31efa38982fd1758e518d7464fb9d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZWFK2380954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49c2393217f9119447c6d8301d2bb38d1d1d656c15ee6e791a11b4888cd49a3. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZTB82289479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c72ec51c24b673e7e69cade507628e5023e8f9ab7e7c99e93b2db0496aa3810. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZTB42271601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0c0f603423963adbca6f2bdff1d33963ce26e1a4d332583718829113ce01e0. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZTB62311757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65605400094298bfa2985a06dfbfbbf8305fecf9c3b607c11377e52b391c4035. 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/QZWFN2345027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47be4086d8c4b505d82a1654364ca7e0fbe3fc7074c54f9442835d21c8c0b5e2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZFZ32511350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667312096fc4fc059d6222e6cdf92c7a8a90339db5a6683625a9a191d8250274. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ32511352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2430729069d5fcdaa8cc314fb4e06f62120603fc5700100531a3e96c5c5b6fa2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZFZ32511353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194faba6e479259d5db6a2998ed5b73bd0dd4a28a001b4c1e0914ee75e852a7a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZFZ32511354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48614e878639e6bf5d8a4d2cb710794d70314a678506358dfc619f919826095. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZFZ32511355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79d88678cc3341f0e8072b1bcb3a910004aac0f967a4f0b7145a7cb7a57c47b. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZFZ32511356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367045558a3218be86af8bc3208a6dad6bf8018439404f22c26b04ae6e05d19e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZFZ32511357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd42295e0731a372c20f1518385f2ea97d4aee6e27ecfc6b4973cddb9e42157. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ32511358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7aec108a4c6ab8029780b6a5934cc1094f8e7801c75b47eb092b0768165f88e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFZ32511359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0849f4c032e9a6863c3cff0bfa42ae80baefd77a2609b9651777fd1cea1479. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZFZ32511360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf421b8bb54460f632b623aef52bf16a3d668d53d6ac835c7e14979a9157f8a47. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZFZ32511361.