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 0xa6a38ab0c4ec54f9bb45372b15d2b5dc76ebf2d42ad3d29b93eaff4986a899b8. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea56a7ce-f530-4fd3-bb93-96d2e45f653d.json and https://artists.proofprofile.net/proofs/artist/ea56a7ce-f530-4fd3-bb93-96d2e45f653d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Background Bossa Jazz Piano for Cafés, Restaurants and Dinner Parties
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 0x6dad8d2cb9e84895cfb0470408eba77fdd3718432f14f24a41d3de3b05bd53e7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBSMU7691791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d2e6ef3af4712cda31c2e4cd752b022fb7973e2f353fc316ff19eb0a17b0df. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBSMU7691792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220d6f70b5f6a58ae6af9464f4ca9f3dc0bed9ac7df451ab20c85833519fef36. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/GBSMU7691793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf515605bf6b1dccc3b8463de6d7aa82816ea913ac9df95de8c23b9ea3041caf. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GBSMU7691794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bed3f1b6d81e9db1dc54a862b9df5d985fc1430282f95ac100307afdc5c626. 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/GBSMU7691796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6a853615aa24ec9ab49cef2fcc4435dca6436d1610a50a7b5e6b75a3d32832. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GBSMU7691797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d8465504bc023e5f076b313cf13f391ba208c99bbccf924c5888b7f4166a14. 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/GBSMU7691798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb38695e7683b892c672b5ff3b0e521e3ea7821f5160be348e3d72a0d9750d1. 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/GBSMU7691799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8f57b1579e4b63b18bd3960ef7213216d40a9c3c80c5b5f45ed2a84552d7b2. 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/GBSMU7691800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c691b6f7c6cd81227e82b8c5fe6007fb28f52aa742b447b194e96703055189c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBSMU8450390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebc8fb7e068ea8fa2e6d3b051cc975b69546bed96130420b97c99efd6757b81. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/GBSMU8450391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc43bb51308f0688c136e546e677d8f8c8b393045d03150e171308485e945a7. 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/GBSMU8450392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62bf1da356bc24be195b584bf89221d0dbe6e33abbbed93f804e4d3454df3da. 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/GBSMU8450393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596c9556f916c3effa42d0e556b9e342ccd26d825128df47dd31318dcc0f4251. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GBSMU8450394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f854428297e3dfe37da2e46cafcf3084077c27f9e7f4d11812c0fd7a2b044d2. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBSMU8450395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3096bf164b064d11dca76f4fca9ae4b1fb1642e0d7e228f98480f517d698ad. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBSMU8450396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f57e488572d7dd996ff809a8024b226bb29fc3afb529418fa4e6b704c6c4989. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GBSMU8450397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b59fb47e2aa8530ed83da7ba50ce551daa66e1b059698e1c2cb17fda6c9ff9f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBSMU8450398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e49f9a2ea7088099b4c4d86032f5e80db42955b5ab095603506fdb1522f11b. 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/GBSMU8450399.