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 0x63aa9690f2bc60d58181c74cfdfa54b77ec1a18e9a9b3c6539b1387ab3bf5d1a. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22b7b62e-a0ac-4f69-9ec6-0f26c9360279.json and https://artists.proofprofile.net/proofs/artist/22b7b62e-a0ac-4f69-9ec6-0f26c9360279.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 0x34750529a69bbe5431c94706e6dd8e7393d69262dc677274fe24a73e7b881cae. 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/QZRNG2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ea486ae26ad1139d33dc0a8b0611153ce083e054e0eb559390d4aa1054d2aa. 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/QZRNG2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed8c48a34421087172d451e23f2693c96ae01ef1068f4ccfd8d7f7437b5b4dd. 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/QZRNG2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0731359c8d0806e802b3845fb650bf82f52f6b4a535448a3977eb891ba5d74. 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/QZRNG2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4ed2ba914c123948a70e3357bf47dcefe30c20cbd8617d2c0eba8b943a99cc. 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/QZRNG2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc995a6dbf06f88d496e9537dfd2c3acc711830bab7cc71694f4ed99316e49975. 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/QZRNG2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275667a13f155deae13d51fb4cd7234384773d020edd0c2f900b3527cdd3f933. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZRNG2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11275dee8456647ee40e6d6349a9c1b10ad88a0b569e1b2c9997b7f3862d5ba. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZRNG2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4421e09a075e658d4313d29cd0b4ab026223437067cc827f6ceb42c4e129b06. 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/QZRNG2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecafc7fd65159d9f6094d1c6473b6e0019542d95e3d60b0c792fde387712c0ed. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:47:22Z), 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/QZRNG2300010.
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 0xc870c0a3980821e0de0709e28d235a01e215e32e096bc4dfb685032dc489314f. 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/QZRNG2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2fae56405b79541a170e33bbc1b38760d8eb278d63f55d3e39cd337469bf08. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZRNG2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c58e56bba1ab1797a41945645023158a1e937c0e6124e45358591544f296877. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZRNG2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014a0f91e5c841432d4f357c70d782ca13171640edd6403907969dee09897adc. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZRNG2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc431b6ea76cbfe436bd35bc27c848e4acc7e36304d36626f0b42f346bb0452f7. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZRNG2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665796c2cc103e1608c410120f9b9df1aa5bd40591f64ee179b88631f1a268c9. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZRNG2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c4e8563547872c1410abd698582e3764a05dda0b9547a1579d72795946c21d. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZRNG2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f5215b46888d33e7d7afc693c7339d608551ffe453dd10400c903b3962a635. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZRNG2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca6adc86205f49245c8b5e3b588dea04ab9eeff25e2f230083b276f25a78bd3. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZRNG2300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd58219357746f4a1011d934f09b89a656fc33ab3c1af507a112fe6574ac155. 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/QZRNG2300032.