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 0xed914e0c073dfdc48840a781de826618ee6558ffbdaa9cf36f570d1231ca83d7. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e74a047-ffd0-4c32-9258-ed63ff58ccbf.json and https://artists.proofprofile.net/proofs/artist/4e74a047-ffd0-4c32-9258-ed63ff58ccbf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Belle Inconnue - Forgotten Pearls from the Classical Era in Sweden
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 0xbc3a2a1d1ae3dacc92552554255d9c0ff88b0c3349a3a9dd69719c9da515aa67. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a652db1c01151fbaf019c7722532d0b2cb1770a5d6f0a51726609c5bba50ab. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1334b5dd37f2bb7070ed71293414e8d0769fe60aa854394d622e939da3eb749. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d18cfe3f8317f00a8b9be3c101ec27306c0070737cd354995a9e238ec51f15. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f50f201e1a69856e940d917465d544698b3a0080aaa812aa420c171270df985. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae438ae4b4fca5ab2cc9bd2cc2f9b9624bca7fc9d2a2afda754c3fecfc4212d1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe18877696bf48dd71edcb9f00272a9498235dbf8eb71079a07a44c41a3b8d5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cf95f973b36c7e35641ebc535d82fca979090e3aa02cd2908963a0a6b999ab. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94ebd7d90e28ca6d37dac512191e7964d94ab9861c31ebd36023c90650b17cd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d72fa901717b32a42f4764db62690a6fd8f4dbc523519052a970f841e0d34e7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfffe22dc7cc7f1357dcd2ae4e352be9a443e152140e5ade852d0e33b45b1f4d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ee8fcdc1331c6452a011d5a23bf215864c995043d83fa36dba5a7979d7fe87. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932d0d40da5debc66def3786853603f6920f780b9ca872fa92219c940d70d6ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157247.
Clavier Sonata No. 1: II. Rondo Capriccio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccab340673190e3594e581d703a543163e62f6c4408f6a1ce39ab493984d258. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb582be236aba4b1894fa4b75844ed09d8552a3e30582996c9f619d6c14504e71. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6c6c52d4f2664619b77a7b19fd9bb71ae0818c1c669639d86a22b56bf5806c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3afc810811d15c45d55c185fac8680acceefa87940e60ce0ea11b9d12b3baa6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbebe4c83a851b2d08c57ad6e44886065b6900043d40259bae9172e3890c7b01. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d52dfce21fb3f82e1e9037de11684370c2d24a465989ee7bf569ea9c7de77d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b954639f85cc49ad298c08a2db217167dea17bedb0afa2fbec67cffcf6a8e6e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6af4488d963f8cc80234b1d2853087ad55fb71a10e278b912edb9df3d2d786. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62157255.