1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xfb3968a2619cfd7e01503401b72c0541528387b74a6128863f2f21db483b8090. 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/a5da9a9f-ee8d-4e7f-8be1-1a81071fe0a4.json and https://artists.proofprofile.net/proofs/artist/a5da9a9f-ee8d-4e7f-8be1-1a81071fe0a4.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 → block OTSBitcoinBlock must exist at that height 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 0xbe9a1b769af864a6aaa583b88f378d0e07c5fdca1490331fb438d86535858c84. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USA2Z2100903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06118fb867fcfb1efd6c745ae233b3c2bee7392a707cad2766e15057d258b0cd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2Z2200663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad34f7e77f5cf07cb26e3a1d25f72916d9ff1450b6eb8039a4df895a12e968d. 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/USA2Z2200666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dd3e801a9a49c102a0c38bd93731c613bc864e4ccd23c99ff6a3c461bcf5d8. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/USA2Z2200667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b51340cf51aba0b6089e56f295235d260e26c234d4e5f54970267123acc3bc. 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/USA2Z2200671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321d1b9b5eea15ff98222439c0105f5224c2a2f4671b91b6bdde647f33f9bb13. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USA2Z2200674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209db1c948c9331cc3a351fedb47f3c77e4961580bebe9f66ea6dff37f8d4a1b. 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/USA2Z2200679.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4845b73817260b8465145a49877c2dd1faf6cfae1fb43ed52d3ed46f56f07fa9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAGZ2360802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c850958aca54073ab5e938bfc513f9e1c2414652da64c19e427feb671c9b430. 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/TCAGZ2360806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb654ef25b048c2c931e6ece52fbbbebef50df42f03c2e1b957eb07d653945043. 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/QMFME2180309.