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 0xf94fc1ad9db7a8d898fd874eeddfada7ed6436343f27336e8e3b2c94dd99377b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ff40ec1-4130-4542-abca-b812a284421e.json and https://artists.proofprofile.net/proofs/artist/8ff40ec1-4130-4542-abca-b812a284421e.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 0x9aa0fe6504ddba84351c0d8ceb51d72a353dc13934d30865faf3a92cf9b56a5a. 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/GRUM72401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535de18ecf5e97ce1bdfe3ad91930d4f0cc40e3e73cc7e31ddcab716963db489. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GRUM72401011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e31d6bc5c43c2481632ae9a1c91ada55c6b253c0af07ae101bc19d79f0db50. 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/GRUM72401013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589d4177ab301fcad1b0880d036c3a941513f65fabc3ae42eed5c85dbc259d14. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/GBKPL1978745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058a7ddd75d40fa4874cb1132a3ddd2e74b514260e5969757b0cf8beedf01351. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBKPL1978742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975e0e593c3d8986fbd29152b82f0a486558f789ff622a3daae79078ca502321. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/GBKPL1978748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2e51951279157c6a839c66158b4460c2199f390df5cf5f78ebcb52b9d1c7e8. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/GBKPL1978740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2a0da8c56321d245210a1e89b2d71feb1a11f5f4be805be6ff5d45f0aa4169. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBKPL1978741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e366c38dd11e37cd6b2e8652a8991ddb0e0d22a6c5c76d8a9a2c0ff72627941. Chain 2 (Bitcoin): anchored in block 957665 (2026-07-12T06:13:49Z), 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/GBKPL1978739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41eecb50e15d673fd08c08a2f4bc2acf5a76b9d25b39787c7bb09de2ddc50db. 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/GBKPL1978743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdeb681bcb2e22e288a0277425811f4dabda398705b5671701f7e09fef8791e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:38:45Z), 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/GBKPL2014993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c4cc6410fb994355063dd1a4622f2600198deecb476c3ee5a7c4b03fa9ab54. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/GBKPL2014997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a0e00512a741559af3d873589dfd200fd5c7b9b2b15defd154c7339a556f70. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GBKPL2015000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504c30da1d024f46580ef525601e1768b6a235cca14b8ae5414b4acd0f107ea6. 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/GBKPL2015002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d400296ad289fe6f273493dbe376dddbb2ba2dd3d799340663b3ad5271792d2. 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/GBKPL2015003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe448c31fa198c3f6a88ee8aff68c3a530e1c52c344cb6a32c6d774cfe408700d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GBKPL2015008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c059e4d6973a65e9da3bc4944e519fc593a5bb4ee4ff25e5794557df5cff4b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GRUM72101716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaec7e100661b43eed47cb9376723df838013f2a4463a0a9294cf9ff07484bd6. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/GRUM72301416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355612ffee2603ac2fa7cc3239e77cfa4c7ea36778b9eb47219220703fa90425. 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/GRUM72400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9538a345022ae451c3ae87729f897bd316d865f220c3c4ecb597b86e272c1d1d. 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/GRUM72401023.