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 0x0d6a38b6326f9279cddfd57326310f8c11a8ac9f18b6b8f1d021f89f5f7403a4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c336588-29f2-42b9-ba82-8bad83e87b09.json and https://artists.proofprofile.net/proofs/artist/1c336588-29f2-42b9-ba82-8bad83e87b09.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 0x8e617fec7f41a08fba42a76bc08270b4369ded08f8044b26cbb6900d5188913d. 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/NLCK42233086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571d34c3e7a3e413b63fca5ca1b1896df3b7a286258e9f15d490cab2987c6d7d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMHK2448846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0672af93eb7a32def6263ad78a6813b046b6ccecce38a1baeccac93468f051. 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/QZS662418621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818b634c16a87cf73f8729f45abe1d506a3a323dd0ed0a1d86b1f1e6b7d04d85. 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/QZS642427560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd967622f70093a81ae7b1a6e456e92a321cb2642d7883173ef6ce295dcbbb767. 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/QZPQ72100253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bd6df554396a1a6756029035db476939a2e6c27fa39e394568868287eca752. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZPQ72100254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa14b0c2cc13cb29cce120a69b10fd01791bdb6a89dc5e125c334a15be919fc. 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/NLCK42504333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedace2f2c2e444df58efe94df9246d7a4b948bfe7746517e454807ed0e9a8182. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLCK42504334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c90f9d7192606cbbe78fb655f34c60481a7423b3096652c1a8833700b0bea2c. 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/NLCK42504335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d85b975fa5574df8ae56f23cbc846c351a2564d9bb09816cb96940aac7453f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLCK42504336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002478a5e7a5554879b9c3de7b8c9a27bfb95ac57134b4fbaa84e548f4248d15. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZPQ72100278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e617fec7f41a08fba42a76bc08270b4369ded08f8044b26cbb6900d5188913d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLCK42233086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a54961b6a828ae31c0d40f8d52a50d9fb5b2a905b8c5a9f4208204db3ca2ec. 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/GBLV62310485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2f1fb579b2339f9399a57541da7fe3fa180bf3c4000fa40dee51a4856c2579. 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/GBKQU2281709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244d7754a7fb66b03acd7492bf77888c1ea8c3e261d312bb18882c3891b63c30. 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/GB8KE2327934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63eb9aa17f7ff9d1ca0e4e4cb61570a72dcfa850dfe80dfdad872f52bf315fa. 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/DEBG62105304.