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 0x66224551e2d95440ad9f8db05c0b6a24bf741b033342e0b7bba64e12577bb8c8. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90020a5a-1ee8-4852-a717-14a4a4439206.json and https://artists.proofprofile.net/proofs/artist/90020a5a-1ee8-4852-a717-14a4a4439206.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 0xdb35a3450fbee58b701e491b868b8bc8721f8b67dc9955ebcc87edd62fd11eb5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTBD2344909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462fecbe785ae36ace3e802a84124a43b9813d448eccca7882759db01e935d6c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZTBD2346465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6110daac16f835a16534b6d558a5941f11447da6ae456903f1ff2c67b0aca1db. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZTBD2346461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a28786bfdc49928e1bc6648c23fafdd80121aeee44f717ae47b518ab515a47. 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/QZTBD2346464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069b19a8dc8d5a148eb32e94e5d38e0730722a85788268682662a9d62aae48be. 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/QZHN72457640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf370192680310fde3326e17869d7734f1b7d733c8d11766fd7805fb12a01ac51. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZHN82425027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2730199b9dcd4eeb23902b1216f0907cbc6288e1f405b53b71142029540b1bb. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZHNA2464327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4ab7baff27775b657ae2936d4a26da108c7955a7787fee8ba5f76b9c92fb62. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZHNA2464328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec887fdd370bff378b60aba2c818901708ac1ad1afd263543a9bd063d44a6bb8. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZHNA2464329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70405975eedec207fbc5e72b7729bc82c2236177235e46acb76bc3cdd7ef2878. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZHNA2464330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174111fb7f057710d6a72aa30a6314f6b97f717b7bd2fc1be91814b1bc13da3d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZHNA2464331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7be35b67a2e7f90a71a54bc01c30c1e725bd0951b6f939bfd4099ef5f716c3a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWR2571608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca734f26eec0b306ccf53bb341da617034999e2c5ce660924ff0d2a7fdb5a20. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWR2571609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0b4f583de2c504a174d825f6c4ef7bba599b258ce52864c00e2ad3e51e0372. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZNWR2571610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0b733f77ae3d64b9f34979700d9b99cd17f483f832d030415f3dcf54754804. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZNWR2571611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34330b1a6a79cc97f8854547aebb750a3de7528ad42a818dd6901ab2b1e28eb9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWR2571612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3025eef80da8172b5fdf03065e5b6d6caee765c1e51eae5029c577b98484191. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWR2571613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed86a9310ad8534cbe2e2d22265769e8bbc910b952871cca8cb1286ceeff95e8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWR2571614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19441375930bd95103c98740a26f25371373cc26b1311ed6a296dcc36b1ded4. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZNWR2571617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16830e9affe7a125c5b15b1ec83c8f02a683cb512f23c39e419dee9a3e8607e9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNWR2571618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcebd0f3a81aa420472d892d620bcfcb24e8d5b19bda58c9246b715edef3515b. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZNWR2571619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e4eed72213cad09fafb50b64518c8ccf13291e40c9ddab213c2f4655369ba5. 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/QZZ7L2523364.