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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052a7deb0f5609692d72112860012557cedec1f07c8c5149c42a7878deda06a4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea3b3159-2b1a-48d5-aec1-74b270b2654d.json and https://artists.proofprofile.net/proofs/artist/ea3b3159-2b1a-48d5-aec1-74b270b2654d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b49f74979957dab8af18becaab63bc2db4ae1a041be096222716cd09edb80b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZDA81829237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb966cfd14b07ca412d7a91e7a8bba70bd03dc66f99d05fc7ba8d357a33143aec. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZFZ41928452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a167c11a82f3235f56f69518b758d462964777fc761fef66746d65f267f2611. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZFZ22047676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f6abcab4cfcca3556d422908f2437da8ff94cb42830422f33663a180a62bfa. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZHN82109756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916f55f4378dcf681e73c9976c2ec05d422373686ae4cd7330134f13c76fec48. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZRP52414686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916f55f4378dcf681e73c9976c2ec05d422373686ae4cd7330134f13c76fec48. 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/QZRP52414686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf19acc848f8c7809706924fd67fa28eb4714ff9593448e8556dd712b77780db. 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/QZZ7L2476882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6eca38b72e19e3a7d4defca084c021742b58bed83aba356fbafed772944cc6. 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/QZZ7X2405941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24f4c2b20f6571208cf31590a839127492e52d65b47f1e3970a8b3d72ead7d1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTB62583004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8a1616a5d57a1c9785ee368d6684382e8274796adeaa3457afb06cb5621e1a. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QT3F72575511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d11d7265408977ca15a1771796536dd1d082fe3d96b162861f5221abd0152a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/CA5KR2401668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938df9cf0971346e2a1194000b3a6f6d509e99259ede1e36b80d0a13f4198718. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM24S1704721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be613b5224b722e93d0c7014f6ed66a1a64094b79c4b6f7c3208a18fa55aeb9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM24S1841718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171cf55fd2f13d224e71551a00a41a366690b35598e615cd5a16e2e15ac1a683. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM24S1841719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec27596603befdfbccc86f11b465b0604fc79cd49f5df061921e463f78e3d8e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM24S1841720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c442690b276409ac0c858aa0f2449ac2efdc34c230423f7d1c948f1e55231b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM24S1841721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56487a15a8d14e020c4631eb6402ba372c01b5ef1b40afeb2be3ce5e04c7ad21. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S1926134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938df9cf0971346e2a1194000b3a6f6d509e99259ede1e36b80d0a13f4198718. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S1704721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56487a15a8d14e020c4631eb6402ba372c01b5ef1b40afeb2be3ce5e04c7ad21. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM24S1926134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2516c737c3c813f041c61919f789ef29885989c77a7357aa722c38de3ca528b3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CA5KR2401631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89380ae0ecfce0912ec76ba08efde4c5946f31708473ece3752983580a8fdc5e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9L2457292.