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 0x0ac93887b57f013367c1ae6027239e4205ee73fd1a8f57f0bb75f05d5a882412. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/908556db-2521-434f-956b-c6a1154af5a4.json and https://artists.proofprofile.net/proofs/artist/908556db-2521-434f-956b-c6a1154af5a4.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 0xf7e2ef5c7e921e794dd2e98ebd80618674f8f56020a641fd00b436e60f451e2c. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZFZ52053577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7d65607b3d19e78ae6e80279ae534109eb98f8da63c541ca7789ad78d36a60. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZFZ52053578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da918c6e39e5d04e9af68a7b9bd5bc8db4190b7275bf3f4afb38a6442c63fca. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:56Z), 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/QZFZ52053580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b01d51fc11cd0e097951f2f0f4dd2cc26ebb71e438bedb341090fe0ed10afc. 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/QZFZ52053581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5698d74ea9e86b449f054df249dde3f32c3045941b78ce8c532a69f2d2da39. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:07Z), 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/QZFZ52053582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281bcc52ffe13a39887a50c2ed4c2fe16ea345ba89e5501ce46e177486bdcd89. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ52053583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30800fbc5fe62343d7f4083aeea40bb318d54ab14b035c0c5809e4bb6af4a05. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZFZ52053584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1a6d677e19ff31546f18373007ccb6ae94471e41654b1a28f59f98f7da96c8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ52053585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6065fefa2bed654528bd6a0993b9792c42da2d6b17537849d5bc04edfe134b6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:30:43Z), 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/QZFZ52053586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddafc3e415f56da008ff8503633094173f06fd08fdaf53721f729f9473684bd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ52053587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8f892be68f53690737796308f5bc5c31a0665336c933ec844365ca9872d439. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ52053588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120d212c04018ae2fac5f2cbe8497f5199ce6f6b2e89603060dd87606bc8cc40. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZFZ52053589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6917f0ee44f3783d3fd607ea7d9b4861442971529a404afb2ef3bfd09428ea0a. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:57:24Z), 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/QZFZ52053590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe363c3495f84c509a4873eb8b894fb5b0131a053ba2663b2fd48396c2f6cb6f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZFZ52053591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21ba0e01ecc28698adfc31ffec9f777abc2f2da1e5f36dd5a025f886e18bb9e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZRP42252677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21ba0e01ecc28698adfc31ffec9f777abc2f2da1e5f36dd5a025f886e18bb9e. 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/QZRP42252677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f1debc99da6a41684a18c2263dc7af6801218501d4e7b3fdeab350596a4a8c. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZDA62341146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0d9d1cb81dd73d14ac4f28f418f66d3a4269e649d2343ed9fd909019f52a34. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZNWR2309025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb2f69f29ec5b37708f11c84db27cf60b5377c57939bf7e124b6da1821035c7. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZTB42392626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69596c5e52f9936791ff0602a422325250080dab9bbed9be3211980a21a1e6c7. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZDA72473292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bafec7a9891b4cce0ff6054d7c122803b56f03043d62c5f08fd0c57637b446. 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/IEPSU2500001.