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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b19dbff76273c37673423eee7577a2eaa1ecc9d6a33a43a6aa980ada242c49a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c837f33-4ee9-430f-b82b-95166fe1993a.json and https://artists.proofprofile.net/proofs/artist/4c837f33-4ee9-430f-b82b-95166fe1993a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46a62cf6882384a39f113e2a5b7ee1ea2347c26c3408bbb585ac46f73b4b858. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:31:08Z), 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/TCAAW1154212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b9b3525f0d48a35661d2ed291e09af3c57e035aa6de7632ec6d5c358570819. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZ22B1841748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9fbf17db75616428e727ee588787902cdc2984358cac0b780017e694d2d2bf. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZ22B1841749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743400b81d4cb2d9f705710a3491a52fea5719cd4b52c0ac3e4e8647bc0c0690. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ22B1841750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a90e49200b5ba7e7e25dc2024c186e528bf5a42640a756fcb5578fe045e29fc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZ22B1841751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ff6321785b42e68b0724de0aa839c58d43903a185cbc0d3c4cb614993953af. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/QZ22B1841752.
Stranger On The Shore (Jazz Trio Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4746570b29cc5c45d7b05b530841e09fef5ccf7d629cb3ca9f366a4a1dcd2704. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZ22B1923274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfde449bf60534b07f827199d85c870b455e91ec455d610030f60b0c9ee1d5a. 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/QZ22B1923282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2235c5d4f14287112970156e141e4927616c28706557ed84508d6570f187a4e8. 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/QM24S1916699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c14a30a3e7d3a277afd4d40c78a3a501a52bf3d92a879aab8b59e547437f5bd. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:10:40Z), 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/QZGWW1924762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac6a18fdc017dc0573c1e10855c6b69a9ba1fb4620bef51064f8b14d9cad533. 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/QZGWW1954757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915ab0041be6f305a93d0f9a1da97a431e331f34a622801f8c8bfe56309cd4c2. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:58:49Z), 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/QZGWW1954759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d9f79cc45c9eefd9ab4e46fa2ca16fc10b6a08c077c344c59ff1ca1df557e8. 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/QZGWW2037994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab98430ae958bf088d0678a9fc799084530bb7fc2fdbcf391d240e829aede605. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZGWW2082826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa5faeb7cab317131040346f710092d54717eca11c2c2666a8500977ad2a67b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZGWX2223144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3884f205b75540f512166c37e2d11943e3497475808e2eca561f5b0f565aa6. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6M2130164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fbb1d5ec05106fcbc2381e8531f024b6a91567f1a914d9b2980133b88c2fe5. 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/AUMEV2166895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b71c94398c969cd9091c649079dd6570b0257e8b2fdc0822ecddd6ee0fc73cd. 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/AUMEV2184911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cce75ce638c964fd33f400bbb927d86002c2afc3c6b74c36c49729f799b5f7. 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/AUMEV2224504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed39332cbe4b706192e59e535a9492122ef98f132397649fd8946620ed32e40. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/AUMEV2240026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60c04659e7a5b92e4333dd7540ba322bd46ce2462f83a0de87f7b4c9012aa37. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUMEV2241814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235e1c8f00e72150282fc39768eea56a46a4235419e7cf2ab16c40b630deaa97. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/AUMEV2245452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8bcdd13c0f6674958747946df2550b34cc0ffa49338f6ea4f5856c3bc5e5ec. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUMEV2264710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8122206e296cbaafff0d42998c00a1931bb9fbc881f0bf81e5a8b52b2cf967ab. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:46:57Z), 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/AUMEV2272424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3608dda1048d898a4799c496e4a93d35cfa22f5ba03bbea84afef5fc4ac74fac. 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/AUMEV2276672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe87aecad4e6f6e08f8053f246331e4aaf5c826f620c149cc666b68473cc9e5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUMEV2290137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb9059c6cd4f8cd9ddd7e3ea57f2c15712daf0aa5b16b1d313fe1b2b03cfcfe. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AUMEV2336650.
When Winter Meets Spring (Extended Version)
When Winter Meets Spring - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9023f05b3c4e83fa6099af7542313fe7f74d74ecb6228d50f9cf6d87a3382a74. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/AUMEV2349632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa04f722c30f7b18dbc0a642c0218008fdb6f4a128b96eaa911cf18d1ab23b80. 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/AUMEV2451426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e597b242126bb9bbdf9008b62c2f787fb2d14970d3c4ea1142e63e028dc99a6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUGBT2400412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1535a10ef5554a6691427ac41a2ce1a7c8f59d97cab7c79095a0e787a4934e9e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUGBT2448179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1de02075b1fb5efed6db8999dc45d2aa121eac439ee4f9819dc72f18b79191. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/AUGBT2461342.
O Christmas Tree (Piano and Strings) [Oh Tannenbaum]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666dfa911a648d78d30dead45b16b46815147637e23575282c6b132d023c4db1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUMEV2535011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2e066d17cc1859fbb7f48853f225ac6d7e05c56f053421afaa01e9029dad52. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:00:24Z), 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/AUGBT2562731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca061d6f683cc0e5f3c2ffc4c09774d8fd7c12068febedc7d8df06a274d06630. 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/QZGWX2043140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe86224685ba469403671d24db0fcc6910427c8fb673d44aebfd9a771c3c96d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AUGBT2363852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d55ea2c8d8676f940480b6ad6ab6c885343272875c3806ef03b16409677633. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZGWX2043137.
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 0x7b80aef6d92cc003e15c13567f7363d362ff922b2777e97e707d9dcce8e140f4. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZGWX2043141.