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 0x4a03693fccad4f854f9d907bc177bfe65e1da350711d4ede82769dd006e99c45. 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/babde016-22d5-473e-9ac4-99825a0d48a2.json and https://artists.proofprofile.net/proofs/artist/babde016-22d5-473e-9ac4-99825a0d48a2.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 0xb1b02ec4e66b352c9061d54efefa40b24177e4aa946890fb1762cd94da7775fe. 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/ES54D2000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cea7673bd9a3ad8a0564e3e03b92a055d45bf97ee05b96e599961615d53a2a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ES54D2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22b625ce492537fbce9955a9983ff4552821861be672a02c031c3f5699cce04. 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/ES54D2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d9f5bc17310aca7598865cd3aed93be4815e1b942c817df764b8c0c5ccb3b2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES64E2302870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d9f5bc17310aca7598865cd3aed93be4815e1b942c817df764b8c0c5ccb3b2. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/ES64E2302870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0dd6540c5171e1a5f08fd71ee51724d19f4e72d58b092c0b70ffc291b46846. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US38Y2304683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6c8ff62e0e50a7b4c9b056575566dc62d4d86a7c471e35830bbfaa0685fc0d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJY2424064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6c8ff62e0e50a7b4c9b056575566dc62d4d86a7c471e35830bbfaa0685fc0d. 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/QZNJY2424064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaca83151400f198c13fb52d328d61d19e38064220b0280f4bfdb3957413e1aa. 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/QZW9K2473596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2074556548566822af0f3566010082c22045380786584072a75f0daa3edd3e55. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMDA62581184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe094a307c7780df7f58e6e9e20ffbaf6f7ed4b777f571364db420e7a84bb496. 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/ES54D1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac77d13455cee99bea95af3b8741a2e512e993f7de81e172829739f964e1afa. 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/ES5702100985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8787fdb378e8f301f4cf00ec1ce938fb4a297b6e553852ac8704c933f5a2370. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G2300979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e9c0b6798492fdc439017ea93be697cc99e9910568a6183deb726e3110240f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES30E2000137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668342f30d97162d21f5cfe8d69f2c82b145c02921b61fcd750ec53b8133992b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ESA092237396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386972ae0b34f1384afd390273a18f77ddcd5ed4daf7b7c1fcd428a92fde75b1. 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/QZNJW2390700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386972ae0b34f1384afd390273a18f77ddcd5ed4daf7b7c1fcd428a92fde75b1. 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/QZNJW2390700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87bad97be901cfa19bd855f453926eb1fe500cb2a7a75ee100ebd41cbe7aa71. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2416524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11afa3a60c77b8336ed166419c05f550d37f54381e0c9405b9a8a1d93fa815c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMFME2150217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd40028d436a072155c88f3f05c4c928cdadccceddb931e01fd81ef8ae357c86. 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/ES75E2413037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bb79821095b8b1c2109bc44a319a68455ea6df04ff005515a6f359e7f439e8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMBZ92182106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd24bc788d48a9349f3c2b15e3c07d38ae10eb75cb224c61531b61ab63b7a28. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZ5AB2338940.