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 0xad75164e8b8c856eb96b959b982a7b55dae44865adeb7177a899a880bb9bcf02. 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/7b5e4c7c-91b5-43cf-906b-7c190a10564e.json and https://artists.proofprofile.net/proofs/artist/7b5e4c7c-91b5-43cf-906b-7c190a10564e.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 0x368052464acf98bd87090e3b510b2f097029594a7661dd08961cdd48fb1f6b97. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:57:55Z), 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/QZGWX2233777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7b62313500c56b1010575cc4054bd15547547be76e628d39fa33dd6186685d. 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/QZPJ32292071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c908ac8b338cb5dfae28b3001527c1ab2bba4de9761abe4d9a4b6a6fced9f37. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:18:16Z), 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/QZPJ32436085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3812e7426b7d2101c8c4ead980c308ef07be3ec794448f489d462d7cd02db91. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZPJ32448686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa821f4dfe5f1d533093f25c50acc7b9a088c707122c80e45017cc016bdb5ce2f. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZPJ32448970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa154f0752a1b6825cb5252a31a36385059ff49c07044c9b8545e23db5c744b75. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZPJ32449013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf513df2c72bc48fc8ff4667c7bf6af60b57c69c35ccb6466c7fe27b100905ba. 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/QZPJ32450251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa821f4dfe5f1d533093f25c50acc7b9a088c707122c80e45017cc016bdb5ce2f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPJ32448970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa154f0752a1b6825cb5252a31a36385059ff49c07044c9b8545e23db5c744b75. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:02Z), 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/QZPJ32449013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf513df2c72bc48fc8ff4667c7bf6af60b57c69c35ccb6466c7fe27b100905ba. 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/QZPJ32450251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3812e7426b7d2101c8c4ead980c308ef07be3ec794448f489d462d7cd02db91. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZPJ32448686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d362e857488e121314d9c3f90cd88ba38757e3dda5450976345bfbb97ced3bc. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/QZPJ32408827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148b6345ea9159aae477997a0f94083c5679311ee6f9926c0dd1dde1f45050d8. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZPJ32383068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45967ff62cccb0fa5469647b6bd5ec677e184f373fc91d3383d8fea7f18c520c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:54:21Z), 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/QZPJ32382501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1eb16c03f4dd2abe7b9399139352668401f32813fe1b93d3fd905968ec18e7. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZPJ32381915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540c8f9a9856079671e24d40468e1dc8fe8724d4156cff704e6e523c4e2e1299. 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/QZPJ32407567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1331913f7017f23cf82632b4e4eb1721d9b349b5c6f9e8fc158913a5eff7d974. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZPJ32355632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642a437d2932aa86b6ef47dc292bc2c0ca788abbeaae2531800b77100dd0df7a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPJ32355627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc446d849994e234930222668e103d75b76608661f89ff32e64aaa317424e0a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:03:34Z), 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/QZPJ32355649.
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