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 0x4ceb52d027777a6d6d613fccddb9a3c38491a5d855aaf04d1c9ce5250fe51e3e. 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/f0dae126-b876-4007-af22-732943340064.json and https://artists.proofprofile.net/proofs/artist/f0dae126-b876-4007-af22-732943340064.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 0xc7af1c21a1dacaa545757c83ecd03c727f7b8750d803118904f21a4ee1284f96. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMFME1958969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c69423573d83a5a05625738e413778f9fbcf802a7429fc3d6630ee5a3dd040. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QMFME1958970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb564af71f5c51e05fffe8bdde03c0fc253a7cc517d75b08988fa59b625463717. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMFME1958976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4d04bbd0676352e496024978181d03fe13e0f454d2c2d5c1e5c86c6647c1eb. 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/QMFME1958979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2039aca62bdb1db617654500bc9d985150594fa88020db41284b9600c5f714. 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/QMFME1958980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72e70ce4aa9c2080a68f7290b750763293eb0332bbe42f0f310f4cd7a902124. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMFME1958986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d7682c596d5988487819ea35383b6a67280c746385a0a5ce5defc9845eee82. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:06:50Z), 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/QMFME1958987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91aa7ab38d0fc946df12ecd7eba554f77c45c69386214b3a24c10ff60794d4f8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMFME1958988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa82c84cc39a4cee66cb2f5fd3cd220672f15cd638ee25cf80b231bc27701b9a. 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/QMFME1958989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3d184af8f7f67e139813e513f7524caf42f15e0850c198ab3790f9eeebacc2. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:58:15Z), 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/QMFME1958990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385fdfefc030dcf3a422e44730c94a849144f60fb7fcbcc99e37f39f1aa626a8. 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/QMFME1958992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252650bdaf138564cf1b6527083027de4a89a06f610ec31cf6afb1ede1e24519. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QMFME1958993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346e2f6a8bbe72c119d0ebfd4190307e98dc7788a76ec6aa429767c7f7bbbe9b. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:27:19Z), 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/QMFME1958995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecdbba63b494b69af0d5ef0a2f472f9586c0d3ff988ecb3cb6d69806006f9ba. Chain 2 (Bitcoin): anchored in block 957634 (2026-07-12T00:26:43Z), 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/QMFME1958996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cc18ba4eff07dde6cd7fed3b3630166e2388e86d013ac60f6dbc6d553b557e. 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/QMFME1958997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721fa0f500e1ca3bf16e388ad1493c866d61fb11065fe7fad2d86884cab410b6. 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/QMFME1958998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fee30feb3338d71a1bb7ae8515dc30926bf50bf9097f5f6b4daf984be408bc. 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/QMFME1958999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45888dd04adff12fbe2dfe105d56ec3eb51d7f55628101c9d145afe284d1198d. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QMFME1959000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598d82b39540fc76f17cdf56bf2a0eb9dc44262f00947b3fb540022cdbd0bb51. 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/QMFME1959001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1c8ea7a5b7bdfb2124a20c2cc82e569682cec362261b66a09d2ef778602827. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:00:06Z), 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/QMFME1959002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef586fecd2454686b3ca9c1e04e392164cae5337e461a55ad456b902ac2f1b0a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMFME1959003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84edba7788a95e741e74b0396b8c00766c7373a7838f86d59193e39a7c83092. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QM4TW2029702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5f63f91fd3a0effa65776870bb642b150601ebb7052d10ad22a1a4889e5588. 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/QM4TW2029703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bd3fb8b643bd67ca08a19930982c9d68d537d9707f683da0f742f2cd79bfd1. 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/QZGLS2467062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811f36e19c457563646a23eb918979ba98296d68bc75d1ff0f95d3c4c5f07992. 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/QZTPX2419066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156f24bd9cd491f933de0752ee45b82d7754bb72ba79a17fa57869afe4cf0e87. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZW9L2474424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b01e530267e851ff91e01de89fea5d8e775829d2ccfe98a21bdba5587a19725. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZGLM2550210.