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 0xfec3f96ec45a1c63b3b6eee5a17ecf6c0f6da29a7244641297142268c6335bc9. 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/7e7f0b12-b37a-494d-a85a-f1cdc4ace8f0.json and https://artists.proofprofile.net/proofs/artist/7e7f0b12-b37a-494d-a85a-f1cdc4ace8f0.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 0x61fe6bcba01522ec74df51145911ed267ff81b8b0019bffad753edd849c15be4. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:27:41Z), 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/QZNWY2031516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9a41ff7009825be5538d55d535db172d640f185cab6fc642205757c7f556c8. 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/QZFYW2180662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac30aae3a4dc1f13cda8d685f2e7ef2114b30c944b19939ad991a49a604e37f. 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/QZES82109239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b26fb5487d79875c9e9cc65cb8d3139f2aa8f724014224645fb418baeb26c8. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZHN32112218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf69086bd4a6c521cf6c510816f29a3b95936cb8cfafbc9ff03c188a4c47642b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN72173324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f067dc48cc83f43e7f4b0412adc8f4c5e8a5fe532d9fe2660b1cde35aaf092. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZHN92196149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a73044eb1e701a20a91d877531ea6811c69316d5bba6369355fd803a56373e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:03:52Z), 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/QZHNC2107842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfad2c0c23881549d4ba83f61b98899e948e72bc77d27e0b955c8aad96b17e92. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6K2186544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327655e5ebe2dfac79742ed2530a8b968ddabfb36bb33b9f4bea2bffdfea5813. 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/QZMEM2141089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904872ccc1069359f2e55da089f5d788024fe89a4fc1b5f9c66cad6a60dc20a1. 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/QZNWW2199001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676998102da52285365f10942bd7a20e5f0cc9c6eb722229555ea5220652f641. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTAS2127236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1b2ec0639f6ed7bae70f7b5ec8d95d052e36e63932a9408d247f758850389d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US23A1546882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2563067059755b41511361e43a01b2253c104a07894525160a4188652897ac7a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US23A1548028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117f864b518705ba7988bc62344da754c8ff81ca21df9236ee84576e24076cb8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US23A1549449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3b1891eab10b814bd29743b4a2cd16c6981a987e40ed3d524779bfaae89332. 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/US23A1549453.