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 0xc88eb73d7b6d77b23f8261c4149b24033588e8fca97b548cdf0c867d796038e7. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84b37b3e-9749-48d3-a848-4b0ae719b7a9.json and https://artists.proofprofile.net/proofs/artist/84b37b3e-9749-48d3-a848-4b0ae719b7a9.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 0xac7d1f963f20bbd2d0a9e65f741f8cc6cebbf1aade755c8b451d46e275367049. 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/JPSR09600402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b160e7f1bc3324a646ac88d7165245401da2d6ea90f278ff70414d11e76e43e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/JPSR09180429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6ec049e45194fa67d09afbf50994aa95e1b8a8f74cbe6304999617222a62ee. 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/JPSR09600400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfe14555bec6d7a1edbcb7ccff2c1bfa469602dbc176139bee41836bad8ade8. 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/JPSR09500279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff642c0240fcccc538b129507cafa6aea281069ae3d9be67a5f43b6d12d7525a. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/JPSR09380153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a96fd70aaa000b6ded185710d6d1d41ce7e2d4a607a842804b6a97c6c626f6. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/JPSR09380155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f3410f2964f211b976ff5d431e06537919a0732dbc1c5ee5c792260199f025. 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/JPSR09500281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e248f7453174734e39ec9e80626da29f59bbbaa1448857b619f9a52668e5eb. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPSR09602319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b93dd352c584e138e5807f4f472f41b3866a6adabce66149035faf39fbec0d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPSR09603634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddd97291b35ac1e4bbf71ba4bd87856a99bc6bd33e75c5c7d5f6cd15251388f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPSR09901062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355333d4ee20e177a23060df518431953d92b9718f1b2d82203d23d4471d1a1e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPSR09914247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283d6593b1579492272bb0739093f6bc53e3ae69ac6480f18e00d37aa2a1cb65. 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/JPSR09073369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1adb8aaa6b08793afed9eb84065af58387e74e5d78298bdd85030c410eee5d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPSR08918950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fde3abd45264d7f1fad1c109ceaa3f26c562f186c72f9c8e9cec1956be99a1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPSR08813470.