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 0x9372ad4c8f6a62978f68edf9de8a534567df0a598e6468dc41a3ba86eead0332. 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/385288fd-76fa-4498-b341-52e7b643ffca.json and https://artists.proofprofile.net/proofs/artist/385288fd-76fa-4498-b341-52e7b643ffca.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 0x7925d1ebb9739fc54cef8ddfbc0f285c19c7ca0b9f90df7d1ebe635b31919cda. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/SEYOK2241014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1d1e8f546bebfb800a6632a038bfcb024b0aa534bbeca18cf81e449db207f5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SEYOK2312248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d800296466dd66e8325312f723e33ff1c28e7278ca0a37a0a155103f5cdaed. 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/SEYOK2312252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52db9e101f63c16e2d11de6f8fb13f6325129abe295e7a60d54c9286642d3876. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:50:20Z), 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/SEYOK2304006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0083eb24e7fd9487ec62a26026a555a9549536c6e9fc95ded8b67aa6ff8a009f. 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/SEYOK2312256.
TOBŪ (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f54b8d8355499757cac531948dac174116048d12ade8ec2d9ee3906c77efb2. 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/SEYOK2329306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a134c9dd1b0dbc433f62d4b967db4c21004d4d498ddecf951868a75937476f. 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/SEYOK2431019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ec72d766dfbd102b09283ffd1b7e7441a791aa49d352e98824ea3237973a29. 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/SEYOK2431707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071129214b188cb88524b3ac2bec3020eb5145f26226b0ba5cadab250c901625. 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/SEYOK2423508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7872ba38d45a9c2acd266a99a782c34e2056ba702fb756ca902ab08f7d0bd7. 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/SEYOK2431712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8826908a023114b02068b8946cb9cfe7aa45da4f16bb25b3a1bb6410e56a7f2e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/SEYOK2506467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690719d34cf9b9664708475e5ff271267c1b6b77138cb08b3bc1292f7ddd647b. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/SEYOK2520063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600c3248b2240aee550f08d3d3d0f96e9108ce76d658d64a31be8b15634ade5f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:42:05Z), 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/SEYOK2520064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ee41e7806703a70d03f8080494abc5ff9d247e0322fca4d0611f2805386049. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/SEYOK2520070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008e42196d48fea63fef7c7539b186fbbb835e5cb4bcf74755f374be115fa9b1. 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/QZTBC2322090.