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 0x0ee24772317529af73c68c2d53c0159af95218a73913d9bf89b2d274b7775335. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39e661f6-0b4f-4c09-9105-5bbf7bacea73.json and https://artists.proofprofile.net/proofs/artist/39e661f6-0b4f-4c09-9105-5bbf7bacea73.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 0x43c13fbf9fb57a14fb27387fa7c2a9c409277661965975d33c573fb255004d8f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DEUM72001344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3a39a2aedb612c51cc4813d2833b74072420eb1811240a640b3e6e468814ac. 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/FRR642301305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ab07a381ba9813d489d12eca6bfe7bebe2f77e1f2b263319f6fbe0b4f762d6. 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/FRR642300819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7643912bfe19d6db1519cebafb2281d87b29c2326ffee745dbd6a84bb3138200. 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/FRR642301307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a8fa992da8454d922ad14214827e648c9bb803c320893fb7ee4d8aa371fd93. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FRR642301308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c3fb59bc804dd3c38d04fe58e36c6e2050f29a09a5e228dbc4cc60e10d566d. 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/FRR642301091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52cfc303dbcf473d420e3fd93337b5774af7029e0c9c54c941a908d7a3c147e. 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/FRR642301309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef7058e8d31cd18c8f9880ef82d6491078538da2778f02e99b7dd41f6e4ff0e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FRR642301310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836c16631e8f46970aeef293081238a5df59bc981c26656fd87e4f4ebd9e1f1b. 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/FRR642301311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3249a46bc85d52765f687a2edfe5d667d5cf561311c0971f2ac905ada3eb2869. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRR642301312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa62b7e4a1e42f11f4322ae870b7895ad55ae0270111d2dbeb5938ea935c7522. 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/FRR642400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a1478c3847fa4c1085824a6cda76fc1fa58a5824eea2680753f713a683efa3. 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/FRR642400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c5380926d1c09248416bdbca64d2c8ba68f844f6cf407644e0b067390f2f11. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FRR642400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a8c8ae13c57051e37f9da9eed81ae283d052ffe7edf2e79566200438732fc8. 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/FRR642400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccc64730db2e34fb3dc9464cedd7a9cfb4ef73890cd53bf28a601c83f375557. 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/FRR642400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f2cf69560169a96bcdd14b7d7761b02a8fabe699f2305826b4f804de0d324b. 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/FRR642302284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b647a34db30e9b29090b28580ef5f87375d53a281c11fabf88c62232ba6285. 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/FRR642400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ca54f3f06b4d5b701c7e104ea3f6e3d07ef6ac8c529de82b6b7d38eacf3571. 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/FR9W12218343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0576a1f070cdb7895a4c814c304ea0470792c5cf7a400896fb2c994719f4ef1. 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/QZHPJ1981988.