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 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 0x72530d8bfb48abce8317b3a884debcd1668b704281cdf4cbd3249a4ca4f25ef4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de4cfc2d-e9f4-4147-8f85-5303a876220e.json and https://artists.proofprofile.net/proofs/artist/de4cfc2d-e9f4-4147-8f85-5303a876220e.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 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 0x5cead24a6735fa14052d8ba29d384281b8fd6bfb7b8cf33ba5d39dd721e2dbac. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TR1762000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaae62b654ff5dddaf5beeb5cf526f1ddcfc50b40be0f535842bf494846dbe8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TR1762000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaae62b654ff5dddaf5beeb5cf526f1ddcfc50b40be0f535842bf494846dbe8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TR1762000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcc7af2f9ae93f95d863775e48f2ba4967aa262db0a5f1631e7b104a8fa9d7c. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TR1762000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97cd1abfefd1964d30cec2aae45a07f410aebd71289b3f9697ea967d4331b36. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TR1762000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc155a18d52d135ace990d6561ce62c11815fd76ab67d85df2e1eb66e83889ba3. 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/TR1762000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d41bb6d5ccea4887470e9c511d3c6f8c6339baba7282bbb981fa3cfa724446. 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/TR1762000117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623260805d91b90097960d7426812a0ab584865bef0775ad12b5a645ca675747. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TR1762000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded0c2cedf832c837da70a4d5b25ff1931f3395b49338a017dd33a9e3d0707fa. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TR1762000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763a64873b81465a7d1fd9ab6ebf6d37818233c20f62178000826cec908931fe. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TR1762000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841154fa9f416fe7dab41518d9004e08661187ac2453b2fe00a5569e60ef3a0a. Chain 2 (Bitcoin): anchored in block 957703 (2026-07-12T12:26:40Z), 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/TR1762000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcacf737d26f7ce5810d86472dec9de5d39666b70e8b5ddcc5d251d7bb0a0aa. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TR1762000094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcacf737d26f7ce5810d86472dec9de5d39666b70e8b5ddcc5d251d7bb0a0aa. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TR1762000094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97cd1abfefd1964d30cec2aae45a07f410aebd71289b3f9697ea967d4331b36. 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/TR1762000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763a64873b81465a7d1fd9ab6ebf6d37818233c20f62178000826cec908931fe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR1762000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841154fa9f416fe7dab41518d9004e08661187ac2453b2fe00a5569e60ef3a0a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TR1762000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623260805d91b90097960d7426812a0ab584865bef0775ad12b5a645ca675747. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/TR1762000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded0c2cedf832c837da70a4d5b25ff1931f3395b49338a017dd33a9e3d0707fa. Chain 2 (Bitcoin): anchored in block 957702 (2026-07-12T12:25:41Z), 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/TR1762000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3987157bd3dde3be67afa800b9d6df71a2f36b9c232b0dff0a98bdfc79dd4d7d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TR1762000119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0cdcfaf796bb3015c61f3dac813ac4a5b4bcab8cc89dda95b09271066cb68e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUBEC2239478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d30478a5f55a6ddf26f08df5ac7d2bc727a6f3d2086b82b1bd241c31ed8193. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUBEC2239480.