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 0x2a6a4aa67ecef7686f45e66e5f5bbf55ed13b193e3b1233b01ee1e02424d14bd. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad53cb98-ab4a-46e9-ad0f-288646f0242f.json and https://artists.proofprofile.net/proofs/artist/ad53cb98-ab4a-46e9-ad0f-288646f0242f.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 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 0xb03c9e8fd935012a8d2ec59d308a05f1e1ac5761ec50aa0e6998195357fd33b7. 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/ES6642200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a3b992d6d080191ac9b8003e967c146282eaedfd1adbbe1da477b67031170e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ES6642200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c278e51b0ac692961cc457ad4b6fac42c19e83dde103634a7b1173962b734d7. 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/ES6642200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1263de4fd761a280e0aa084e4ff48047c60b85c7611893bebcb9ffdb4a911e6a. 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/ES6642200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe709fd0489ebdcc8c94f0840b5a8fccfe116b6954c2af7610f89bdf7d1fe41d8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES6642200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3257daf11210ce6cb6c0795a482c92390b56ead0928e1a1769c113df99a7e150. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES6642100142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5b14a28675cadb084dd263552ebd1e7e4b737ae9737198b8c80b47216187c5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES6642200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8110666a400b7663dbd7936ba2064067d19f20bc10cc527ef4db3cce126cf650. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ES6642400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8063d970cd1bf0c55e8d5f2b542d69ed96bd1f4b63fcd9691d6bb58a5cead1df. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ES6642400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6382ca052c52354eb322a907809c26bad13931758481075847e566335753e848. 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/ES6642400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3198e85fca5b7618b573e4607e2ae7632849fbae74afe1abbd0a36123429b282. 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/ES6642400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6382ca052c52354eb322a907809c26bad13931758481075847e566335753e848. 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/ES6642400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f17daaaf8371de5c48d23d152ab2a9d8851fc9a751474ac9877413a9f17c6f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/ES6642100154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005b93c44ca6e007f997569f37c36ab9cca0858c1ca0f753cf40a789c3eac67f. 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/ES6642300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c286ee9fb36f68788a0e0e4cde423030b25ae3d038d4f91ee33b73cb1510ffe. 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/ES6642300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f7f1b0b7237dea2b333eb23f4724c09f28aef971a04273e3e292a87f1028ab. 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/ES6642200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe709fd0489ebdcc8c94f0840b5a8fccfe116b6954c2af7610f89bdf7d1fe41d8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES6642200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5bb275c5f85f799d2833fe28d4e92d046746262681de4a3197ab0beeb1ae4e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ES6642100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3257daf11210ce6cb6c0795a482c92390b56ead0928e1a1769c113df99a7e150. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ES6642100142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fd1e0c9925a347af1cc85d93a16eca3e96b0c0b68c3891354b8c3e61d809ba. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/ES6642100153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c63e58d72534cb293605157d49bdb2dc2ad74351c79a63afc9f9b9ac8b96c5. 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/ES6642100152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f127b8033a39e1e31b1c61373b1660fe9126bd0c5bf32745900091caa8bd493. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ES6642100150.