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 0x77b0f23f24db3cca12e00e8d042367bece628fb20619812f4bff3cc04e423397. 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/74ca5c61-6fde-47a6-9764-cea6b6e65869.json and https://artists.proofprofile.net/proofs/artist/74ca5c61-6fde-47a6-9764-cea6b6e65869.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 0x349051e4e5b6490324541d2b8ddf67d03fbc9674733cb7c704d078da20f068fb. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZRP52484453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de8e0a1682c78ad5872841847fbaa10b8f14b04e7b9ff1b9b0b4759ca821fd3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTAY2407265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840d5b6d48a98e9746b27cfdbd5a3b4905a4e1cfe420baf684f419d72e775476. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZTAY2407266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2e0c4c63bfd4b65b775d5c9c0f4dc684a96b1a8b7c0add0b532b3781a7e218. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTAY2407267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3897c8c7bf765d4c672311ffc4509305fcfcbabe693f2fc4289315752738d40f. 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/QZTAY2407268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93186668a22f298698beaadeb04c31820c76e0fc4c32db976a7258fb3758eb75. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAY2407269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21b9f8b45383238ec097a4d3811db96ed80a5755e088ca310ad2ba94e1129dd. 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/QZTB92408092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86534fa343833b3ceb7848dd29af15b11c332376eb4ae7ec8fb363b9984882d. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTB92408093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbcc384e90f187d0a268d8a815aebaaddb0e7e4d22d00432de2438b4c76acd7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA82598601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0f03329d81df6045e7c74aa65e8163296b4a0bf0cfc0e6975151207dbe2f03. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZDA82598602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639aba1e7494342266396d4ca22d9d979a09936c6e50a7bf2bbe3deac9d09c45. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZDA82598603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875ad0f0406a84e0013797efcc7e5efe4398688f49aecf4b06825aedea8ecad9. 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/QZMEN2503138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ed62ecafd7166e57c2355efb67b91661424917c66f3621f6a24445e037e1fd. 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/QZMEN2503139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0917edc68a4b76024442a0e34672791e16609a4b74757ebfcacecc3ab982a0. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZMEN2503140.