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 0x2b1f43fa3e4eb8b34ca3d8d21a579705e9071e632e4bf93addee032d70b906a4. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca73c889-f416-4832-9e90-8b6527a83050.json and https://artists.proofprofile.net/proofs/artist/ca73c889-f416-4832-9e90-8b6527a83050.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 0xdb98609155a98f7fa44b630c8e4827afcdeb9bc69855e4edba4d6f984fb741d3. 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/QZFZ61941680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa421f8203c077e76c13a00e4c5fcf03a3ab1be3176636564b8e8e256e3ae2c5f. 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/QZFZ61941681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5025b228606476629f424ae87c124d2ca4172798fdce86e185055376e277273. 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/QZFZ61941684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282a3184fa1e6bf3365bec98ffe918e91a59d232a48d36a08cd39f59174e60c4. 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/QZFZ61941686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4053cfd06371d348b176fbabb52f3988c2635042f65314587b5e003efa6af78. 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/QZRP42208163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7916522365f6277fa552adcc73d118d79825138fa8318b6e0aaf176a1d9822. 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/QZES62265703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162785bb2e586fbfc1ef726801daa31aa99b018550a640f2a5a9e784ca9f9ef8. 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/QZDA82273284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162785bb2e586fbfc1ef726801daa31aa99b018550a640f2a5a9e784ca9f9ef8. 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/QZDA82273284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7bb04b468c52251d5caeb48ebaa6594273274ee113df775b3b882b4ad30dc2. 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/QZK6M2134613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99f36b267db54e9233b25b73442cee9b7cddf89ca82198b81c76cb8731ee4a1. 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/QZES82173361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fd8df9640e193fac8f60c6b50fa72cbf12cfb2af56638253064e2cb2d93adb. 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/QZ5FA2050550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc61c466214e0fd112ef0aac346639f788a692cf4b8918c4ad7229da0b24afe. 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/QZ5FA2050321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcee9a7b556454517dc0e2573b80756f016bfb18c2554b644c54e83a24705d4a. 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/QZNWS2092744.