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 0xc64cc4f4457f8c5db97e8530fe21db4679e22f46abf0df5ebab1262cc07b1619. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81aa6c49-22cb-4a43-b0fb-21ff81bb9f40.json and https://artists.proofprofile.net/proofs/artist/81aa6c49-22cb-4a43-b0fb-21ff81bb9f40.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 0xc829b92a540818891f51d245810a285c2db59d407c2cad7c0d22555b17e08332. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM8PZ1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb8543c5547770b2f03eac7592d73cc558eb09ee61551dce5d05d11db55f7c9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM8PZ1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ecfc34323e76b8cf110ae0631e9561baffec035d6868e7b2a1757d6901b060. 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/QM8PZ2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf50738a805dcb8c64d7c8a58cc54af91d4d8b35cc608ac8b49ef8460d11ba08. 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/QM8PZ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd756d3d903647739dc454212a4b2f5060e7a18ed1e3c7154c7ed7b7659b74d17. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM8PZ2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8780dd405fb89ed2e0a03ab7ce91fb8376f2b3f7b558a6eee15c402ac4fdb100. Chain 2 (Bitcoin): anchored in block 957013 (2026-07-07T08:31:11Z), 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/QM8PZ2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6778db9d218742f756a6f2d7bfa90d4a80e15f5f8f0632ae5683f6af07e6c18. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM8PZ2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b38ee7719b1bde89b986e2d9afc728c47a0d954ad4e85ec5bbaa5a51d87f4fa. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QM8PZ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2651a5962191a188ced786e152af3e10c61cdfd2d5c5d254b2ae9bcc951b02f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM8PZ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fb0b4b8e60116e8c84cb8d660cbb21a7330fdfbf757819b2c336e5e50c309e. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QM8PZ2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961788f085225610ec762a29f0d742083191ee3e2e758580a991e20abbc1e670. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM8PZ2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa82d3a10c24ff0bb968f3900919f716803d60931e05166f2d3232b33f5adf3. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QM8PZ2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1f53c7ce2d9a9d5f663218ef18478560ebab69095ec4e56960f22573af81e1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMDA72327666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395cb593e7839385b22ffd33b2f6c37b42d16f6fce0c1232b41f2e14d2b7dfb4. 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/QMDA72327670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be9292f8e354036474d69f740e39812630efd36fb13ebab596b17fe2b908a14. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMDA72327675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9168ea7d04e23387c2d3529436287281337fe5568f8bbacc847280b632ec1d. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QMDA72327667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9471aadf31d2353cea191bb5d4d331ca25fd68046329d5bae0b5859bb70ff5. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QMDA72327668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b07926bece4da4dcc202b4e4332d1bf5ff34e109f13463ddb9614ffa1297c43. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QMDA72327669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6ba16b4c4c98c841010cd098ac491804f4a594282544aaea87b07d6fb2b662. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMDA72327671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428bded2007728e87853c7114e18c25ecfd8be17a177b52d1108c56b66016fca. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QMDA72327672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa1a9981dae3b54d1e66feab40651f2b84edc7d966fd86d07696d22daa9ca22. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QMDA72327673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00091d871b55917ee85991c79a00aaaff8031708417579e4903519f528013d01. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMDA72327674.