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 0x3dd8a366e5befdbe23e508f6b420f76dadfc9df3532cd0b15f8ec888f87e3a43. 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/fe2cbaff-a2fd-4912-9004-5be22fcb4cd9.json and https://artists.proofprofile.net/proofs/artist/fe2cbaff-a2fd-4912-9004-5be22fcb4cd9.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 0xf262548af6997f6f79a0e000c4859f88435b5dcc7bb7d02f35c75de561460b0d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GRUM71700256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cdf39acd69d3c5994433c7257bddebe5b6d49e54262817c3f6bafc8ba408fc. 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/GRUM71700282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713da100ca8873a2a8df4ca5a64761a2b1caf9c4ab5674fd70ae1b95b2dd5059. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GRUM71700257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bf224c87a850326bac183972294b4c38bb7fe59461d1ced077da2fe182d8af. 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/GRUM71700259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb075cfcf9ffbfb10b0e8041f578168a6d3ab2efa3cde9d90d7ae05247ff9fc. 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/GRUM71700266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1777074bc111e6a70b94dc4621696403687f9df3ee1028e856d3bd500d73d67c. 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/GRUM71700252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4e842a230babbad51284ac1c750d2adadf19858f62a90da3d0d229c7383967. 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/GRUM71700276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d9ec36f0dcd5a4c23afa4e08a0dc0afac21dba8e1ca494d373f7dee6b17a1d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GRUM71700260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72e0720651edd17392b343d7817bd7eedbc80e4772c71d435c90ee1343203ad. 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/GRUM71700264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947918d10c8de1a7e7236e241ea7f4ff3c820ee74d997dac5fb53c00e0155383. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GRUM71700268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1c9c258e69153fa1034540d82985e7b8b73eb0d3050c8bff45d4086d44212b. 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/GRUM71700274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebddc58ae9d52cd9ef9c69dff622165672997e3d055bfdcb944b246b3a76a2d. 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/GRUM71700280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334fd302a774ecae67d3a7de46cf386e676dbd6af091f5fa77cde55225f667eb. 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/GRUM71700339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eb004ab9e5d4ada2adb42118f82d615f4b7a582fe678ca589cbd48754d4c11. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GRUM71700269.
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 0xb877e24bf4683972acd4e525ff2c25b35c06720efc3c74e69f15de342c771594. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GRUM71700267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7b09af6dd33a7f7841a9ffb284ac2bc58abf4e4abdef80c4f208f22f0e69d2. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GRUM71700324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4c7e3411aad8f5447c2c436da2f04e8a1d1bd9380bd097fc6d2f02e5fd9053. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GRUM71700271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca489843de6dd587540e07b00b50fd399a07d09066ec5d3839606f466394dea. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/GRUM71700273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c8baa904ffc27e9f87694ae46ff9ed9da8bd2d449455e53568fbdfae1c5c41. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GRUM71700278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2b296ef86bd2b7e2f36b4f986d489d7b93af0bb807611eac1528d1c09c3b48. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GRUM71700342.