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 0xa20ebe4c18de1de462e06096753faa68ca6a32e82ad1bfc25e4c605ac76b0337. 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/7d2eadb1-46fe-4b76-b7cc-d20b1e6d782e.json and https://artists.proofprofile.net/proofs/artist/7d2eadb1-46fe-4b76-b7cc-d20b1e6d782e.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 0x5ca28bac7c4343faff8b386be6c63155af434dd62c180bd9165ae379117730c6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZFZ32182174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bde9e0fbc69d780dbc787eaf998d8d94e3839b35edc0d6b36679f48872755ba. 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/QZK6G2170158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf6bbaeed6702bd415adbc3d20b9590bb9aa775fbf46be3b0a35ead7ec061fc. 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/QZHN42283538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf174a9f161abedeb967164d801a2cbd41470df0fe26171815d9c689b058f258f. 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/QZDA42354553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb914096221ffe7184f30dd21ebd384b9aa742ae50ff7e7c602dae18ebc0528d2. 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/QZES72315832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6b8825fc35c2c6048cf49d0f5495c6092a29832ef497900827163c38aa85cd. 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/QZK6Q2308987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f0b89a694e87c4f0276505248b7eb738c3dd9257bb1fb7610bef2192d0a889. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZTBD2338604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e46952b3a4693112ec40f9182d3c24866c2b16ae940f78fb5a0ed5ba14ed9ab. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZFYZ2401635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6052d23add21e4166afa3f6d5f5c4ad656a709565baad8e107dab306a2571182. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ42490842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47cdad267d1ccbe1b1042f77203feb98025050e7c04872a2289b4a21c1ee6a3. 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/QZDA72487290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed13f23e945ceb0b0d5eaf356871af764c3ae31a72a82eb5da37df2132c7f81. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZMEM2443260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3263797aff55d2666d90ee4da2542c1458e756de7e1704a0d5c9a6306b90ac. 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/QZMER2481756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98edf49c3a5bd14439e33919a9449149280ab874683e06b8edeee8e646fed112. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNWX2477578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367281af13ae1790cfe83d8ac17ee3c4011bca35713d6ca084fa27b87dd24a5b. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZTBA2475397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035b68f9643e35c28a169a04aa144eb9899cb0ba90054f4153e37aa28d04aa08. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:51Z), 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/QZTBF2443832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397f5b7507d9b233bd67f4cf97097692058368f051247db55bb6e1ec4c27edd9. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:26Z), 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/QZZ762402834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbf27dac8ac870011d871c609d2369520c1c70ecec30bf07accd0c668b2a6d7. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZZ7L2467083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6398862ec4c8c894476d4bcd5eda7eb3673eeb1c05cb6737d20ab9d342c1af73. 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/QZFZ72506635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad95874eb652eb97e4089307074f7603e91636049bbdc10b073f9f5fb378ef9. 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/QZHN32531704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75686814919c40adb57bad1770921bc995f48b851888e767d690ca506c80d09d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNA2587028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a0ce201ee101d238c884f426c41253c365d1c7d7bd6e69d26f9ee0cac1ce53. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:36:20Z), 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/QZNWT2505794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060d9eca6c75b92195f3ad827bedc87e4dbd3ed469d99dd140a80be69a3533ed. 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/QZRP52541700.