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 0x0c33aa6064d99b9921a9c8a0179f44c7c912eb974fa99d686a2a163f8b5e30d9. 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/8ea5b889-72ac-4b5a-b3b6-786b25d7e7df.json and https://artists.proofprofile.net/proofs/artist/8ea5b889-72ac-4b5a-b3b6-786b25d7e7df.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 0x982284be64abaacc454651b56542dc1ec45f3546cbf28e79af56e736c70d4de2. 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/JPY392301152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04bbddd41f9c146cfebd93aebb6dc6586c0c6a7dc13b4df6aeac4e5305f09d0. 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/JPY392301153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaa3245474562d97b1192042c0a55f17f1413d026876f7d255b01a4e683e620. 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/JPY392200476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51816910010617675ecc6bd68f86ab75b97db82b3655ba8bd3b4c0124d4e83ad. 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/JPB602170314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0fb3e3c31ab39a0889eabb55be6a94232704bd012ea4d497a3f97ad522f9f1. 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/JPY392301154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cf540459d09ea5b71e7b7a3a3f6a68686f35eb0a3eac1d02a7dd8c3e18e856. 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/JPY392301155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f053442fa34bbeff287b17e0ed848cd28c5019849c3b63968d70b2b1f42ef3b. 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/JPY392100294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10e83118568e76a31a9b0e4515515e7ccf4a378bc39e5caef2f5b766b0f8056. 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/JPY392301156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fa3caa647d611d398ec5e68cae540e7f5089a01cce4142355541fc5c04c417. 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/JPY392301157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd803b7da94b1afef419335bfc2798ea46393a99dda1cd426b70d3e8ced7eec63. 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/JPY392301158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba9edd117b07e87e4e1a23c7963f7cf1f1d75bfbe1a1a0a8b80ecbe8b72c9a7. 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/JPY392100263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7026a58a54deceff19458f4d2e4a9022c659ccff3574596785587f06ad1345. 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/JPY392200549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ca7e947d4e43649d97a58be69d60114db9f0fcc74a32d8213efd73808c31bf. 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/JPY392301159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4292bf8a01bd59c05928125dedc731da319509181a8927b6687b8559e6ec5539. 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/JPY392301160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bc6128c2e9b9c76e8c99303d063a191d5a9f24586cbe26f8950d6b72e078d3. 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/JPY392301151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50409ee6e1a5e508b3bb4c36ee9a66b4f12ba4cb5c95eb8dab7bade08745f82. 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/JPY392301013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0666585ee091dd0f733e88d61d40b9dd2236319043bb311dc4385530e3c9c7c2. 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/JPY392200332.