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 0xae5440d08e74af7434c1cb7cf09ad32439e056283dcbb437351df614febd2efe. 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/788e26d0-8ba3-447b-a406-101d4c19dec5.json and https://artists.proofprofile.net/proofs/artist/788e26d0-8ba3-447b-a406-101d4c19dec5.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 0x802756dcff13f70689750222a471adb5904f78eb32ab983bfce80bc713f67ea7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/UKQC92150001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069462c18aa418c54131a8a3e6dc70c49ee5f52d149fbf6fcb228894cc1e230f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/UKQC92150004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef12d11c275f22aabdb750c5b409515dc2f6897915b5648c296b9bcaf64aead. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/UKQC92150002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d734aa91ce8744d773ed5ae6e5810b74f1a2339174d085047ac5b59952b06d8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKQC92150005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722ca281def49b692639eaae5b19389293bd43e693174d450ff1edc8fe18637c. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/UKQC92150007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4249411dea3eee4624c219311317038228f7783e24329ad38a1510123cc3750. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:09:23Z), 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/UKQC92150014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abc19b30f47bdef309e187aa006d68527403678e381c5b3e9680795b9ff83d7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/UKQC92250002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de110cf6727bdc0e243b478596b8af10ed03ea670e743be5db47e9cb238ef7c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:44:42Z), 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/UKQC92450007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f080c8edfe06f114475b3c96787bf7fac5ec471abfb19113d062831bde4c43d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/UKQC92450001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72ad4ee6bffd0700c1c20e7d03b688fe448cdfd440e1c14a820a3cf28e7f1a1. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:22Z), 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/UKQC92450004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092c7bf0bf22830422feb35a44801e54f97eeab9e4cf2051fb6a0143d2c13280. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/UKQC92450006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3348d783fdc71f76d2217196effec987385d7da19cfb710680319fc89f55cb1b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UKQC92450008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8325075564b6296d484de375d81fa3dd4f71fa219a69a0f7afb89611a7c9a7cf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/UKQC92450010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432aa96457b31c5a320db5c4ea9f3bb711ab91bc2400c10330ab4bad1023d235. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UKQC92550001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b63647e1af601767731ce25f12a129a99a0e3ee4df46753a6a5d7ddd6e67132. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/UKQC92550004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984c3a60646d4b3cf297f3d8013f189fd31ea77630a759731086be95701df2ea. 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/UKQC92550002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b7d5b9a02250e1893321b812bcb147439e0fa07820d298f8d61b54b56f3a0a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:18:57Z), 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/UKQC92550006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1337892e42452eaab3b0e1810e4bf69fdba475114669f79b47140aa26e926f. 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/QZTAS2170049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad81dc64103c08264f1a0e2f0ca42b93e0899cecbaaa08e1d6635a4db176593f. 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/GBJX32135006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439c54e9dc56a6e6195a44c787d03faa4ad4c19bfabd0483b15e8a50352a5407. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/UKWCH2200024.
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