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 0x01f0b1dc16e0f1f69257e04c87b5ecc3a4a06a8cd9a1e112ad16301431ffaee4. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/451a3d26-32dc-45ad-b505-f0b87803b696.json and https://artists.proofprofile.net/proofs/artist/451a3d26-32dc-45ad-b505-f0b87803b696.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 0xdcb187bce47e8e0722d819eb71a1b1dedb6914350b8dbadfe69c4151c952854c. 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/QM6P42462434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea03c8c4011f3eb2cb5d5c999be560ee8dd50406dfb68618c8154cfa6b317dd. 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/QM6P42454770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4dcd64b66af760201ac005b8ad98eb3e20ac2b8dc195146f03604ca556b6b6. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QM6P42442666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6810cea2e4d0d0b1bf35fe4ec8cd438b0354e42d7c39a62eea1ba76be6a87cf6. 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/QMBZ92473089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7b58844cce570d1f2e890cdd87ec15cde04753043e710c831548b950c77256. 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/QMBZ92473092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150a897d731afed88e52f91790c0ff2b0520634835b6bb2cf243798d85714c53. 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/QMBZ92473090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7610c887c881493d264e0430e5c96f0c948edefc7b3ef10ae369c8cb45256b. 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/QMBZ92473091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5d373017f9734e862fd31f07a096ed494b58d664ead5593fd7696ecf9716cc. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QMBZ92473097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8dfa53797bb4d2da0fcbee872f11fc4c06e2ef7a4c95f0a3cf4b6cfd0e2e68. 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/QM4TW2532297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa541e3184b9bb93129efaeeca09c6922bdbec8b22c14f26135364280fe780cc2. 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/QMBZ92441301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4dcd64b66af760201ac005b8ad98eb3e20ac2b8dc195146f03604ca556b6b6. 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/QM6P42442666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64b242e4da17476fb4ea1f97bdba5fbeb68d12318fabae430a395747e175b15. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QM6P42446234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d70b8056d0915590ae26d15087e1c0a5f84af9d0c93d28bd57897e51b27665. 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/QM7282483800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff029b238096c269f821f98aff213b4a59694501e12db56ac24a813cff58b03. 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/QM7282483803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767f09b81849fdd3ba458a2e5eb95a579f0bd04962501463b4d7e1c52677bfd7. 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/QM7282483807.