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 0xf5eb17f1d9b6db554eb60cdc4979558d26926b1d031dad9451dd9c34ff233ebb. 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/09d35da1-b1ce-470b-8bea-19011619dda5.json and https://artists.proofprofile.net/proofs/artist/09d35da1-b1ce-470b-8bea-19011619dda5.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 0x1928b26ef30e307b8613c9d0490fe8a701864073d5fe70a5818cb0730783a8e1. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZMHM2278250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33eedacaa077e5e6056b93013188946833c433a203eb9082befd2f29febafd10. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMHM2221604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8fc6421fd62e4d63b7408f5755f0b282f906f9d78da8f67f2cf6991cc9061c. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZS652213088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4311bb6d84f5aa97c74cb28f28ac4ba915712c7fa2cfa1109ac0a1686ade93b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZMHM2247854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b2d7fa165d36c8daa34bb9a303223a62e37f2f76da44b31f1786bfcc17bd16. 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/QZS632212455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8447c9c0df549ed0b474c4c213a8f2b1142b490b4ea57021e5edb354d385af4f. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZS652292005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f946f2d70d39af1dc83553570df26c0769679950250b5b73ef8267264ec540. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZMHN2222662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1768ea2791141c1cdb1591c6c1255ac7855214e7f81fca1cf7cde07096d4e1d7. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZMHM2258924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246056cfdf8802043a66706a6134f14b60e07ed96002ac12270a992ad8a03470. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZS632220633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cb9b5e2a8254438ef5e1a32cad706596279025d2300083eacb4a0c2c9ada28. 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/QZS632216369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d9af02dc17020d9a507a8eafe276f17ae9d8b32d499c481dff8f836e6e961b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZS632225842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a762c717a74a7572ddb7e5c68199b37f0945ed32e2d9e64cd3252ab1321f6c. 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/QZMHN2211264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa239d42d595bbcc0fd4dbcd5fd7720e7e7a02386b60f339d613ab72405bf9a. 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/QZMHK2247999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22222294ade8e024932a0f3470f024ca597bbefa1d04cca61f5cb2d5e66bdbac. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMHL2265705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98a42fd6b8bba6620935f08b22ff07ccdf3db02a34adbdff74831fe6d5ef910. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMHK2285471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb494eb32f770ba04bd5b6829a4b44b4cb3112b99c8dd6efc86e84109809295f8. 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/QZS672246523.
The Daybreak Will Never Come Again. - BlackY Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27d6c933f01cec65c25b80547b3e30e05639a13d4af32e10d360f8fa4a8ed12. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZS672233160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13d38d232c5994463e3d0ee48c8446aab480c89f1c4c10bf56529826f2e7b59. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS662200913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1fca606cc709759a7561bcf0012636091507c47d0a777e2aee0cb72c02cade. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS642202704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa42c142fd11a8a891ef5c3db38c49c0e4576fa209983f6e04b50a2c39e1f9f5. 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/QZS662285695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ff2787a54a354a79cc40ced990eb01821062a4adc2538cf8a87485b85fce5f. 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/QZMHN2262335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d6ab7289fb585bcb41901aa2dad61fe45870734ecbe86a489961baad8dc5f0. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZS632204687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdd7fcf047da546c867ace95b57598368bb76f1832a0d05d466fb0dfcc1386b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZMHL2223029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe215944b7f6a1fb2a097319a19b26b53ba29f5fdefc2c1ae7c17673944a09994. 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/TCJPY2499555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5681cfddcdbed02bd8736792640a2a8d46125dffcffec0a7a9ed35f7202c3e9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZJRC1962649.