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 0xa1b7f7e84d959f8bdac4bf7ddf21977291d53aaacb7837a21f4f4bcacb7a7faa. 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/fca3fd53-3ac9-4be6-b400-0991af3b238b.json and https://artists.proofprofile.net/proofs/artist/fca3fd53-3ac9-4be6-b400-0991af3b238b.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 0x425adb4fb2814db53565881b999637cdd8683103d46b037ebb3a8be38bcd8507. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US5ED2304326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7a496d49fe9f6fbbca6eaa30ddec9814370cc953466788c77cdc9fb6a9f17d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US5ED2304807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd6d1e89b8c15a05b00fa34ed4a7f471883b7dd266c8b0b863d90b1cb66de90. 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/US5ED2304945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c06ebaeaae051973c72e4b9d0f5922e3b4e1513799ed66d3a0e1470c07ed391. 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/US5ED2304946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276d08ea7f62c013c711805a7b8806ffc46e6427e13fd3fe64e90b86180b45ee. 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/US5ED2405128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849dbe86500d859da9c51d496a2651e608942f78d54edae9bf5f61ca7d00e5cf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US5ED2304948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7a496d49fe9f6fbbca6eaa30ddec9814370cc953466788c77cdc9fb6a9f17d. 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/US5ED2304807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425adb4fb2814db53565881b999637cdd8683103d46b037ebb3a8be38bcd8507. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US5ED2304326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7638b8cb130699a762976e59180471068bffb0e896aa78867f52338464b36a8f. 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/US5ED2302677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78ba4ef794ab3bd83db81c0f4cdeb4bd5d3a5332c67a03ed2ad5608e7501ea2. 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/US5ED2202196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721dbcc22e2d98e31fe4f3c5b91dcdffa9ade2ae535921d29e830ff22de04d05. 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/US5ED2302636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fd5470dd6e0e6abe1338f60209e588fd848be59f27ec6dac910eb19f9a408e. 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/US5ED2202258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b19b0064ba657ed7f0934b94f894aaef8028afb168d27d611a74da155e709c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US5ED2302678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc4cebd2c8c533a242dbf8fa65db795dd4990ee1d26806d58395c1b58497ec4. 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/US5ED2302679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721dbcc22e2d98e31fe4f3c5b91dcdffa9ade2ae535921d29e830ff22de04d05. 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/US5ED2302636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fd5470dd6e0e6abe1338f60209e588fd848be59f27ec6dac910eb19f9a408e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US5ED2202258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fd5470dd6e0e6abe1338f60209e588fd848be59f27ec6dac910eb19f9a408e. 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/US5ED2202258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78ba4ef794ab3bd83db81c0f4cdeb4bd5d3a5332c67a03ed2ad5608e7501ea2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US5ED2202196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78ba4ef794ab3bd83db81c0f4cdeb4bd5d3a5332c67a03ed2ad5608e7501ea2. 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/US5ED2202196.
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