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 0x31991083d480492348e86982daf3788cc7e48947e2bb4e6e461fd9ab1689b717. 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/59c54ee0-3fcb-4bd3-9aa6-c2fb6a77a2ca.json and https://artists.proofprofile.net/proofs/artist/59c54ee0-3fcb-4bd3-9aa6-c2fb6a77a2ca.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 0x76c04c27b94360e2f2034db14795447c37e3409d226e5d7e840afd8f32910e89. 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/TCAGK2283602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a874903fa42b49b2d9c262e21579ee6f247c1158e6dc5a4b126470e4a05d5f6. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCAGP2261313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040e49ac15edd681369a4aad577dcdceb0ff17997b66a6d256357ac0a2d8b53b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAGU2316955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54b9a02c9e4bef6f7db4608fa01db54cd147463fc7eee41492e33e6cbcb2b93. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/QZL382362061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3042b21bc3037b2baa4be8692ebf3c96cf060778bdd4cb14e99e9b588468bfa9. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAGU2397840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46852014a9deeb51c4e93a9a3ec7290884197589561d45a2f6e8246301f7864a. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCAHN2334581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a51a3dd6539982e961fa4580b25a2dfe9379090e0cb004d1fd8228e0e9bd5d7. Chain 2 (Bitcoin): anchored in block 957534 (2026-07-11T07:10:38Z), 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/TCAHN2334621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651fb8de7f70b0824466c959ea9a5a1c69ff0ffc7d5600d954ccf00fd5348d79. 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/TCAHN2334598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e890c42bb149dab809f4586ffba5342f47b8fd7c3f6e3d9002e6086918f6629. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAHZ2427629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe271be1959876b1a8c4b4f71bace3790af8327d17ea61af1b5aae46373ec4b56. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZHN52530406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f48c3a805a3222871a81f666f21f989294dc2a5b92fe85d48fb502a54c5951. 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/QZHN52530405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d545e9796835dc6bf463f0463bc65bd17f903681688d0df71d8600d6cacfc8. 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/QZHN62521782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1cb20c610f6e4db50119647f15ba31563bfe786a198cf01b08a8e0af3664b6. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZK6P2563912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449f68270facbd38e4354e1712d607b2e464f0313bd26caf64380058a875d4fe. 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/QZK6M2579955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af3b33c0fc1fff18f17baf2c6368c5fe5fc735813d03b7e9e18dcf7a3b7832a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZK6M2579957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659e544ebdb09aab7bc49fc5611dded8f256390284a9dfda66a8b7cd72ef3073. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZMER2548630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a85a2d152f658ab84f1cb1eabf1e315c45d5b43038cf66a7d3fe68877e3e40. 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/QZNWT2534680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430c45095720528e1d57071538321c2f611a143f9a345b5dcecec321b7ba4356. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZWFN2578862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87946fcad268ff9793c33eb3c1926ef9311fdadf6656c4e425f8444eb0c7975. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZJ842002008.