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 0xa424d055dc95fa109eeaaae80affb3ffbd27dc85aa651000e7a6392a523c579f. 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/9f63a04f-1498-42c3-b75d-cc8a46d20cf8.json and https://artists.proofprofile.net/proofs/artist/9f63a04f-1498-42c3-b75d-cc8a46d20cf8.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 0x5e21211f5548751c54d1509ce367516ef250c92e787e14965a4d1a79425d989c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE6HN1921963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482d8e0430bb152ce217b569be5fcdc927614f1153becbad98685c8193da1b15. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QM42K2105746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38890bf41a6974c2da5ec154626f2669b9333da874720e7bd3ab0d984ec89419. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMHM2090122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932eefd49c8a11fc138288cfd13f75d817019ed03ee1355820ef7b091f101938. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:04:26Z), 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/QZMHK2002109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1956d3091b75f0c338ab43b8b003490fa1bbb6a658d38dde532c37d05353852d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNRS2098497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb92935a5e182328dc1cb6b78cd7affb0ed06b0ebe76034cd7b691599f4c23f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHPJ1928170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b6dfeb6e3c519cf50575b2af27794f6b3cae5ec78caaa462565f26b887fc1b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:31:01Z), 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/FR96X2267907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464ff58d5ea4e3dae1b7d3042d3edd51edcbf78cf7e694ab6deaf70130147b01. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZS642297399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c2fc8f9c7de6d688cce2ee7970431cb608982bd27db7ee07153e1dda8d69e3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZKDK2320857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee8524fd0a6a07613a3725e416b8c749c14970031d875289d328f3ba46a1041. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:35:20Z), 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/QZS662203620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefbe5505818f0508aac4366a0f3b78305a645624c412e2bc803081cfa7be0b9. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:36:43Z), 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/QZMHN2222631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee56714e71b01a519048daae387a3286790895bff4e5f0cab56ed21e24f4ecb. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZS632493925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0d66abc28fad5fe46de3333f60bd1c1b393c02991a791424a45428dcd0f635. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6A92025205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5678793e5688ae5d8c6d0c506a2b0006723959f61a23fa666dd12a2637bfbf. 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/SE6A92025206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5796bbbce426c38a39c4181dcbf3e6d91f51d889987d4a2f2e4a28534eacaf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6A92025207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287bdc9243585b6b08930393ea17fc1dfad235596a051e2c14dd7b651ced79f4. 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/SE6A92025209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfade728e82961ef575b14e8e774798190be38e29b7083dd93fc85796c4ba0c17. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR2X42213124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c67635ac2d301f1e77f16bd7218502d388d9ab802499cba4bdf6a9d26ea26b. 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/SE6A92025208.
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 0xffdd272e2b07b518418ddffbc38ca344cc36e646482104471b262434b3659be1. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SE6A92025210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef43e956c0ba1e5087098805e23db2b3d05e1d19ae8a82b24856f22fd654c683. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE6A92025211.