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 0x3e863d63c259175cacfa76ecd825c763ee6f662b2eef5e4e4c4ebd4354285e68. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e1f2eb0-f21f-4002-9839-c9d8103aeb37.json and https://artists.proofprofile.net/proofs/artist/2e1f2eb0-f21f-4002-9839-c9d8103aeb37.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 0xf4b8543839e57838089685aed7f834740f2b026757141816360bd570ce07cae4. 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/GBWUL2200484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a37806124fc8183983ffadb21024885c987f1f53da2c3ac8d698eea679e5ee0. 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/GBWUL2200553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cde4a438c8629efb4087f6df6be5d626a006e9ce6fed7c95307b9fe1978cbea. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:48:50Z), 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/GBWUL2200563.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf085460b926502698ceb7eaf36eac802941256cf492a67f15faf14d87713aa9d. 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/GBWUL2200589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225758776edcca752d4934b69d023be82dbcba5c27561060cc98b4288962432d. 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/GBWUL2200590.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c92c7dbf41d33b038346272246fa3bf0afb8b3c7b7a44ac5eb74d2801dd759. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:49:02Z), 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/GBWUL2200592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6dacdd6ed692daf09a620552b38545cc59c57fb39931185430a674294833b7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT3F22459716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8accd0e80b77f544af9cefd2e3237529d0fb6310f110e52417da66cc6e686f86. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:00:43Z), 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/QT3F32471964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c687cb77ca4c56155ea2e91ae7268fc873f34e31d2f99e45224b4b73c6def7f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:20:11Z), 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/QZHN42501460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7a71bde5c2a11603ddb4983aeef6d38d5e9f97f54a97a62766c21e71ef1609. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:03:43Z), 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/QZMEM2546909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe73bfdb9092bb5641839c4540fc9970cf81ee4ef4eee6e58ec44ef139ec7391. 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/QZMEN2563355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c6b98a5f8523e266a3e890d08456f5fdbefa9c597fafff50ec74932018044a. 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/QZTAT2564787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57ad7dc4134284ff9442f768df7215dc3521a11a5c29af7726ff3c9c04700d2. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:25:50Z), 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/QZTAU2565262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269f90b1c2cc25e7685e49db0324b447c3957a717a47d5f3d76be303999aa9e8. 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/QZTB32513497.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88581af17c6f254fcdb449c0c277641f19b07d5575df583ef6a2666085a9d918. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBA2530978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f864d4e7102b72665b8e64e1f1f6a2a80877d84d7ef69297a2aec647047c0a. 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/QZTBE2502132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635eedbc968ff4a7ba8ff0e7f61814bc9ae414ff014a7a75d875a3f0c44711a1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:02:13Z), 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/QZZ7U2520291.