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 0xfdf37a198385955f51f0ac5b1f4033b4cc32900de45a12a916062a57b64489eb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26116008-a1ef-4d5c-8126-cf48451bcc3d.json and https://artists.proofprofile.net/proofs/artist/26116008-a1ef-4d5c-8126-cf48451bcc3d.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 0xefd0b458b797a7b03d512f9a16aa388f47d85862617c05ea8990c8172bda6b0b. 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/QZFZ42092264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc048e865187131872630ac19eb690da8c347b903fd14faeb0fec830dda3368f3. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHN92026587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fcf1ace893433fea625c138bda86f6eaf307d2cb2744c21669b8e4fb0a44df. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:29:43Z), 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/QZMEN2060678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8617a181414926ac7189442261b01eeac1f674482d62ff185ad3f02a97fc1f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZMER2017042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87d13642b3c73af13456e2884b8a3518e3da43d9e623f25bd466fa0672e94fd. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA52191306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682237327f44a5c0701106806350f026d24baabb4bec89a7a2aab30716c83092. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZES82174651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d3002686bf8318ef9cdc98417b648502cdf40d1659a21a8db4b7b9c25f4f1e. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZK6N2209971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbdb0f99e1535e00fa2b2e7ccec7ad66aaab4fc82ec398167d36cecfcb71eaf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFM2371322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4715bf8acc4b9a6b191fba5f0950ffebba0df97b483f4b9bd88ce935144e1d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB92335228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be97ad74112958058e6be41bc74e4fdd0d2ff4bdecee8bb68fac045dbaebe7a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZRP52462809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012defce5b8bcb010d002f095049850be2369ddb45899fe8477acdecf38199e6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAX2438467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527b2d881301b61af2e4622382cc3a2029e82fd181336c621529d4a795e52f9f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZDA52521067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77120a7b94d2a3e278cba853de4087e618e3b8ba6381471e03e726757117fe24. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:11Z), 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/QZMEP2572865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c99db275e024f805ffbcb06d291cbfc07c3e92f7475dfec3a0d17cf6d90fb4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWW2548327.