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 0xa430f8b761b7424698ee4cfa2daeb8c2b9dbf2ef1435edc435ba921cf91c0508. 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/7388b7d6-8b69-4621-be3f-43fb3e3d5877.json and https://artists.proofprofile.net/proofs/artist/7388b7d6-8b69-4621-be3f-43fb3e3d5877.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 0xd11846286f8f9597b9382d1abf8dbfbe570bdb81238ad531b65c321033e2366d. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/CZA250400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea07c9bd750a456597261beef32169a390b77a0e92644eff2bc9ac4b0783ebe. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:22:30Z), 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/CZA250700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ed1ec1ef4771f13356e2396622031e74e980060f6c47424074abb7581abecb. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/CZA250700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb46d85ac9a881313c8428ba66a8cb3ce1e7066522f10f55bda767bd15035780. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:32:58Z), 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/CZA250700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d68a9397dac3692f063d505417076787cb7b9df2f15ab882c60d979a91fb98. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CZA250700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91886769f19f06ebe441eaca9f3d2c604883f2f4e0267cbd4123215ff4b10a42. 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/CZA161001057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6dfa4bc9d9cf022de5996ac3489687afc5825949127a46318f26d3b7fed05a. 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/CZA161001061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff5f622c141bb528e88de56bd9a1a0e11f4ac66fc869796acde726ff96ea98e. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/CZA161303434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e01c872938f95f7e4c1fdf86b9f82fa5283e3e7f2297f5c25c01cda372d7190. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CZA161303443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27904546054d9a155ee06b1cd95c0bc6432d66d08c18fc2a209c178420e7623e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/CZA161701460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c8934d631d2e4af4a33e348b483b685fb10606d6610be039e5cc640d7a72eb. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CZA161701465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1b3028804527ed8634c8c26fa475153087f01511b28d7df7a6216808ee050d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CZA162401545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e89f7d3776161282d333356fcd5f9ae112d43b7d92337144cb298ebd30530f1. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/CZA162301271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f2320a392128fcd97c99f131eed4852a08d3b010485f30d51881e31e0337f9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:10Z), 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/CZA162401540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf36f6b36a1f47077e9d65459ec02caf68f3d40e35cfad99ab043c95345051d5. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CZA162301152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef6c66453d7deec0598f664a0714149fa02657cee79bdaae324f38ae4a71c85. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:38:26Z), 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/CZA162400412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32807659643f2a84e595b5d07218ea1b021a31a2b5addda4494733238c5ae347. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/CZA162401541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986203f6756b4eed933cfe715e47968219a54b7c4e6a1e9523d4326dd7b93c1f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CZA162401542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3730cb996f4ad77afa7004b9323eb859b252cd34d73e647ac17bffdde815001f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/CZA162401422.