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 0x73d41e9eb5bc73cd24f4f612e8199100f1bc993635c148aa11b4fd7f211dec9c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a921dce-d10e-480f-b07c-36cbb6a1f188.json and https://artists.proofprofile.net/proofs/artist/7a921dce-d10e-480f-b07c-36cbb6a1f188.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 0x1ff70d37762c522feece8489f30d582b6d43c78082db07f68e7ba114e1c77376. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:42Z), 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/FR2X42134204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc30b2b720900895c7ca98cefd3d14757ec55baf281a6cda7a7f9c3f72a18ebd. 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/GBVHV1500199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc7aecc7cb161128d87bf76775eb1c2c72838d70a2dc7e8ea4c8d11f03e8971. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/GBVHV1500200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd19f2bc733ebe9d09e9325b0556e0ef50f34d9d4ab7fca3f185b538d3ca4fcb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR2X42211233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46096db2f7e85ece8b617cad246f430918ee962e4a589edb8fb831c5549a0bc1. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/UKL4N1700230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc0b8e01e3eaf67900a47c19c0478fb0aa3c90b6443e693d1528c0f516ae341. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:34:41Z), 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/DGA0L2359975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92635ce862409c2d3c2f869a2207fa6678b365a07a3993cea3ab69361bcbf316. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DGA0L2359977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb7ad7aff358f2347570df2064f8c8bdcdfa6fe38bdd86ceb1c7b1bf9957a35. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FRR642400685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb7ad7aff358f2347570df2064f8c8bdcdfa6fe38bdd86ceb1c7b1bf9957a35. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:38:59Z), 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/FRR642400685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18360cf2d864b4ba3d4cb702ce77eebce262f62ed71686de82278cb567f6f610. 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/FRR642401847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302768887fc3fe55ba2d68bb361a8f0981953a5c56ba58c95eeb07311ea08d7f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA062030616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0280f77f1bf8925c7d3583fc293bef8ce3dbecd6528e1ca6ac4248325678ff3d. 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/GBJU22100685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f50778fa560fe8398f6d2894abba2955e936ac736ffcf16f74ee1e9c7f85c5a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:58:57Z), 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/GBJU22100687.
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 0x6b5457bacc7daa992b163b5a9c4ae476a8b2b1858b96a42f5e20980895ffb65e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBJU22100686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922ef27ce29c45dc8c22248b3b3314ed1467ff5fe2dc44ba361bfe22527d103a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBJU22100688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fddb1bd474c9ad9d6804799b8f94c32a83b540a83884a99b009d3dfd76133f. 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/DEH742503964.