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 0xad516966e56084c41fe352ff1967bec602f7f01c87a0e7882f1e41ff8ec7fc6c. 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/67485b50-c914-4a8b-b3d6-671d5e8c11f6.json and https://artists.proofprofile.net/proofs/artist/67485b50-c914-4a8b-b3d6-671d5e8c11f6.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 0x2f9cfb5aa3dd1fa0a02522c3e2c30dc39a882989b526aef6dfd2fd1384ec2916. 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/QM2PV1721236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadea7cd8a41c18521fb41d6f86e10b9bca63d1deb30c958a5eea08fb0552b777. 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/QZ9Y21780795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d307f8ca0bb606e4b4c9173aa0166f58a78a9684abba6ddb5c568f5adb560cd. 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/QZ9Y21780799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a72e6112e6522e8a998437b172e2ca10811c81a3e35121e4206003295152b6. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:28:20Z), 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/QZAPG1881140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd1d47df5a68261b5e739b28ceaa51648fe9b6c3b74fe20c3c3248ecca90749. 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/QZDA61927637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ad96bc2a218cad52e75202e815deb9ea7cc763d7133da4c5f5c3e7da33025f. 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/QZES61961569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e4d34cbbdb8de3addcf85441345d134970f32d0d604bffdb82ca0082a39d96. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZHN71934776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b06fad9c835b01bdfa2bf8195f33f150565211eb914d971e3a40dac50811432. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZK6P2002341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613c3cff1015957d6a2cdcb8c2aef7633d8bdea8263f36f45c51a3570572e0c5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6G2066352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3e74f6394a6d96227bbf6ec9aad42e4de3329e6f24f26b2fa6113fb76f0a41. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZMEN2039068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e3152def5c3e7d2c38c7762ef90b4544eeabc4863aeeee5568526c3187a0a2. 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/QZDA62105379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e3152def5c3e7d2c38c7762ef90b4544eeabc4863aeeee5568526c3187a0a2. 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/QZDA62105379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bd0b7e7d3cfa730f9c74deed71940762b7054204ef81936351364acacbd03d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZK6M2442426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a122bd3fc5de7037edd15967e66cd84fb195e5cb6d0d7150bfe9603810a0b15. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:28:14Z), 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/QZPLS2491565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e503a2da6a681ff68a633d383f17680f905fa4baa0a40305eac2b2e3c4bb7c5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTB32448947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e84be3d138884c3cbb7c1bded6d531cacebf6fedaef046e5f84895b0620ed3. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:01:43Z), 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/QZWFL2460849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6106aff7b49c0c8cdc2194441ac318941883f98e8fc51259b0fa6885c774df2d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR9EJ2200280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc534653033b754da5a13de2d099a35dc4112aef9c613e1e2259a3b5513ec285e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR6V81939952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82900e397e7cb088571ece89a8ee096b23fd02b751346d24572a46bb57fabbe. 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/DEBL62200101.
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 0x756510194a8e949694b8fa84579b91871d5a8873137ea4b80bc951f3996b4d09. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR6V81939951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e91b5b75a7fb5eae15b2f3b2178267757d75ad7e4eb6bba18ea291fa693884. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR6V81939953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768f07b6712a850a9c0e2add5f85b08b00127e85ac3cee03b39b205111de7a41. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FR6V81939958.