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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba31d28054bbf70bc8eaf2940540a69ba2e8fdbaf1ceb472e9cf0f9554e228d6. 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/1910ff0e-e170-4d16-b3a4-0299bcc248de.json and https://artists.proofprofile.net/proofs/artist/1910ff0e-e170-4d16-b3a4-0299bcc248de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Reggae Kids (karaoke Sing-a-Long Version)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7c78699e9cb62f5452b98ffec82a1ef064b5270afbda942261bc56f79ba2ce. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USGZ20820720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9628712236fbf9b2753f93f1eea5dca5d4f9135804660e9d564892cef045305. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USGZ20820721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976e40024135b09740521895a368d42318e8f14d445ff00fd27a8186fd79d6a2. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USGZ20820724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa155c6d61c7a8591f33dfbf6bb3dd9cd6a1b90eb909ddf876cef0d22e1dbb1b2. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/USGZ20820725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4ca030b6a4b33db0034cb2e7ba1a3485272c41ffd6e65a21333c798b37a55b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USGZ20820726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c35b3b495696018f207d881877d43ad55cfd94f231e42d0ae7dab31acebc75. 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/USGZ20820728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf2d03c822fcdda246002614c202be2e1bc38be8ae43172507e5c913c8e3223. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USGZ20820729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6de3cea60bdc7d6f68e8f0f5bb3d8d207ecc373a24110ca2ec636890ed16a0. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USGZ20820730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cd2dc36d9813c68b450d2f470636d63c3d6b4d87f7628a558ac921c4a3fb97. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/USGZ20820731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55329f6126616c28efb708ebf9ac5eb294aef361b98c8afbed06ae56c89663a. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USGZ20820732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff1f6771c8895f9d4426b59ad586806dd0c86767764b355f1f500200fb77c47. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USGZ20820733.
Reggae Kids Vol. 2! (Karaoke Sing-a-Long Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64de3dda6b2f670f96ee1093460fd0d7535d613ff0341ba85ab44aaea71f904. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/USGZ21455987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35e3ac7f1362708ddbf0bb9d0cfc84ba5cd07318774ce3d7d08096b956bc536. 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/USGZ21455988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe479f766e8fb6fb491be8e7c1f5b6e8ce63900cd4676209df9d100ef1228b957. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USGZ21455989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf7d17f6bed2b866b4260cabc0d14b946fb779f5e06dc8d0095f7ce88debf88. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USGZ21455990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c6556dc23111d4643387eb829c55a136edc256a27515b54f77500343b77a82. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/USGZ21455991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07abea4959a05a99df9df0c4cdd3c67ce548651f55680ee42e3a283895f740e. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/USGZ21455992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe627ed1d3c109a2bd2b000e180ee093685e06e292783125639b65f1da4d771. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USGZ21455993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b7c9f059246e33e776ac61b767a2cda3d729ebaa2ecc3182cfc3d742b7d49f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USGZ21455994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60f6548ba383a885330c9b00ffb5e6694814b585f88ca1ee0e3469aa1f7a99b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USGZ21455995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4807c403b551ed0f6703e1aeb7d975c3b44c0728bbda1e05744e3d3678cb1f7f. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/USGZ21455996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0990019bb54e6f0155e3abcd6aa35efe46c22510387fddc2a5e78defea9bc348. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USGZ21455997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e4325a053bdc2f010202f8d32d0558d451b61558fd359d6a091c2f778c64c8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USGZ21455998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87b9ae2435ef237f53aee073a0f3b22c635825cf6628e8661f5abbd1a22c537. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USGZ21455999.