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 0xada38814459bbe574ec2c3aefc30b593aaee1edab351971ed63abd361ba2cca3. 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/e00aa979-15e7-4524-bdab-47a7d130129d.json and https://artists.proofprofile.net/proofs/artist/e00aa979-15e7-4524-bdab-47a7d130129d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xcb498de71732291970de37dbd7612e5fbdfbeb25327eac1cbb7d6034b59326c0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAIX2491190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65789ccb5f305ca0778de18fc8037cc2109b624abd483f38d5b0004a6e1f0c40. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:22:49Z), 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/TCAIX2491191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa9c81b561c3459aec7bb3f5f168f72ad025dae8fc1f4da9dc6a4ef3dab2881. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCAIX2491194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8e71a0fdbde948ec8c0db2c7d7f2584ae341ec22a527cf0b48d18bbfe7ef5b. 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/TCAIX2491195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa46dc0bf7363f2591d126243a4659d65637f4529cf3bc27f282ef24daeaa0cc. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAIX2491198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1560c592014f6ad1f33ebb2a868217af3e0a952b9c63427c845b7295801f54. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAIX2491201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34043b65ed31695b40208746deead56cee62703e21552b9580360f19201e46c4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:12:10Z), 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/TCAIX2491203.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f9772a3f148f816a8e3c7af7c9ed2ef02085e27efdfa7967b25676a894fe94. 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/IDA921905501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2216d487ae5d79faa5d58570dfabb541e45ee83b3be4f4b411d74ac77e911ac5. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/IDA921905486.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5979d36fab7cc10b1e5b27b33b3c4a76fb8ff099e93b7dda50a2e818666261. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:50:35Z), 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/IDA881914931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a18615074a2b4740091546bf3a5b3246e8087d672d5fa4e72c2ed11bb3c16b. 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/IDA881914932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39402cda9e4eb4de4bd1b30efb00d1629ba430503e2ade3f4a7aa7c251405ee9. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/IDA881914934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae94ebd8fb41c64d58a4c139a5334defb7a71510d2a714305834e034cfeae292. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/IDA881914938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efd49019b1bb089c5e094deaf0f10fb85a988acf0cdc8618d9823950375a32d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/IDA881914940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c5f227e54f4669945fb2419f412cba6358ad4f4721f1acd48562198190fa32. 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/IDA881914941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfae553755a2d509d3a0d9cc2074772e42e9db3c93585ea6f8b2089922533c2f. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:38:40Z), 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/IDA881914943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9677e6369f4d6a504e6e146b70103c6933b023f7f0640dd70afec393f0dcfa7. 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/IDA881914945.
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