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 0x2fe5b491122abe03327b5f3e2c9e3fd0febdcb0b7418162b3c6b33b75f1b03b3. 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/c960424e-a9be-4dde-8e05-f4116d0c559c.json and https://artists.proofprofile.net/proofs/artist/c960424e-a9be-4dde-8e05-f4116d0c559c.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 0xa62808b11eec6473acdd9315310eae317d525e438aaf4e891348c6f4040ca374. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUMEV2469930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658e049989997fb72aa46fd2496d2e4de12d9138f866e48e9063fa1e75105217. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2448449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efbc81d017a4c227bea401a587c00bdc8580172ba75c27ed4e348786d90ff14. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2418049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506bfc329b379dce8c61f1f4f3f2a61b2cea13d5291a3a66d879e05ac5f4b1cf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2401634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb5421be01eb81bd35b56e66b434bd0a3451bf71e23618c6830148388802950. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUGBT2335095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0f08086904ce3a12a1088ebb130097f2fc348d0217ce90202e3ab42bb0acbc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUGBT2314207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893c273a4649db3aec680e12ec39099fa770659099a13f7e73838dbf1d0507d5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUGBT2309048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d72e21fa7a7e7d7edf16da38e9af132407553f28d238349101d9813494ee2c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUMEV2366711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a5a995eda86ef78638681a26cd42fb3ad9c847485956294bd5de4b11505c9b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUMEV2348953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ddee9f70cfe2164c3157f826d685c9c1607ffca85d670fdbce1ff6abfbb06d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUMEV2337160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16eefbc3fbc4ec7ad560666e25b8f5462c4a1768918e3e0b84534bddec318811. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUMEV2307086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b9b0af43105da45e045fae8319ad57b275eeea278f082dd6824b98e4383243. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUGBT2237682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe163fa3875d10397fe58d1cd0e98b2bc4e093cf906144f5c0e0718e55ee6aa29. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUGBT2217665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2308baa6a9a91f03eacd274cb7c95f37cc853462c237dc0f6c37f841c7fd4c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/AUGBT2210385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cdc956a49362e1b09f400f777d60c89da30f69c0fec4398fe2259f1420fcd4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2269824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533c215e526def2d4d10b305b3f8c3f617ddcaa3118d24d490305322755a5568. 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/AUMEV2255485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ee7c4ad74dfd548b30bc1fc3756f9cfd08b7af0ee1f1bd7699fd12284ed54e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUMEV2242582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df4536c98e64877f1240991dabfc86280276010426ca8a0f9c6a0df56dd30f0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUMEV2232817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb7b358a3b83b6a1a5bc4226cd6799acba01cc565639dcd45fc3ca90735dac3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUMEV2211883.
A Nightingale Sang in Berkeley Square - Instrumental
A Nightingale Sang In Berkeley Square - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ff2f80db0486f2869b6b5f76e1e1bb0ac526b48783b9e3f0e8a071e8aae375. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUMEV2292608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd290f9d37abe46c4998232fb2381869ca98cef7669a8723f01017009c9c08b1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUMEV2172955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b6fc5b7af45b82a44624a74785e149749ed877fc1ed55644e811f8ba2f3732. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUMEV2170206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0d21acf822a2bb66d76f1f206197095881d88d9da5d1bd213495ffbd11b62c. 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/AUMEV2157877.
Spanish Romance (Piano and Guitar version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571232c22a869a61eadd18d8596b2e5d32aac70f6749bf96def2b88a9ab78a77. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/AUMEV2145648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758e3c578d73feef48fb192e2892e61466b36aee37df80462cc2a781f37167c6. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/AUMEV2145649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e140fc6620b974d296db639f34fe62d08dc3fc3aaf0ac7eefb50d0637ff62e8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUMEV2144287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc11cbe6b984291ec07ab3b36706ded53672d008d03dbf04a960c707ce36ee67. 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/AUMEV2139364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251ad213cc817c40654d0da95136f2bae23403bf697c7aa091f7c45f6d9e0e80. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZGWX2133131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53259070addc76dbb3949b5cffb7d4a02bd28d68b03d2b0a8155b50bca1c0972. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFZ42156593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dd2887285ae798c95901feebf7be2ae5dcd45d06c38a46d9b2cec4cf1d499b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYX2113890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9c18b3088befddd57463cf7d34618a8ec469c74581755df09bd1eddfbdc72e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWY2076787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa591e44e71a532fa9c4aa610ecdbafa403cb148d32e6893f2023493472e493ff. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWV2085670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ac09bf03cbae61089a57c226511428deca8bc0c3c3e54e0fc110c8a9e6bc89. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWU2032223.