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 0x041f6c54ee7507e2a314f8890017677873996ea1c0076264e98dbf662c435676. 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/44ff1cd4-5c39-41d4-bbf5-a54f1401664f.json and https://artists.proofprofile.net/proofs/artist/44ff1cd4-5c39-41d4-bbf5-a54f1401664f.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 0x1a1e8e7ad76c209c270794413a1fa61130d33d5595cf5618dd56dc89a1ebcfc0. 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/USUYG1395225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dd5158b6a029dc4a5c1da536100716cf971a6682adc1428992ba93e86d33a2. 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/USUYG1274604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09483970592cd749a1b5eb54e164bfc067f8ce9c8fad7ea3ad422771f42bed1c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUYG1274605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc77664b7c4f3ecbd663511b714bafb6a245e8f959afffc82f97a6f44c813d2. 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/USUYG1274606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a56bb59095f045b9f8081f1d4dcb47abf309798bb79527817c7885d5fb3df8. 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/USUYG1274607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3cccc6cc507b41149fdad47b449ea71591ab13d1b06b95887edff53cc74861. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUYG1274608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a242e84500cc8217febc3b6481e05dc6e88d5b70644c0c2b75562841da77f7. 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/USUYG1274609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d180c73e6d17172272366971e96daa80a72e3f19fb7fb449b97c46deffaafb. 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/USUYG1274610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b0ac3d533212550458adc097b3206f9704a1847b9903dc5f3922279ed9e463. 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/USUYG1273483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac937e6d91ab40dc94f6c2fc423e67b496dc0adb2dfc620f91142a34a26e906. 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/USUYG1273656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c97cdd50135fae442016f98896f207e5f693f9ce8ace6dd66432c3483f281c. 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/USUYG1274611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbc038e10a85bc17dd4b74f1b3fe3d999d6671fb455d0d6bdb6a5a6c5b2a89f. 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/USUYG1274613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e124b62d306f99f93b503be9220a8faee5e6add972ce395ebf29cb15b8a46a3. 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/USUYG1274614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1deb4b14181aefc8c5b578cc64ede204f6cf99cffa55fa0f218f373340ee65d. 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/USUYG1274615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a982e68f77373c84ffdda7cf8fd3701d033336ad282a88fc69e6d96d1e46b6. 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/USUYG1268961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72de6aca2c2c9bd900ce4b1c7882b6760f7261021b730432997f1d490628fdf8. 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/USUYG1537457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168734dc7965fdade63ee8a8828efdc264d00b66255a8a492bba722658427425. 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/USUYG1537458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f8cb1c8c160ff6a05ac236555e37981b78db6790645c67aee3490790047ba4. 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/USUYG1537459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7b9c828eddf9744ca1a3fa0c644a6c03c816b747c13cd3f28240772e6e745b. 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/USUYG1537460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb1bebe811ac477c422a6efdf93cf2c1f7dba0828ba41fb437a0d725b77ba0a. 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/USUYG1537461.