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 0xbdd4c4803a845cea9fbc10fbcbc22f808c888e5ffe34816315664a21da3ac05c. 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/1619eb71-4476-464f-acc3-33e5dfdd6f81.json and https://artists.proofprofile.net/proofs/artist/1619eb71-4476-464f-acc3-33e5dfdd6f81.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 0x010fa6b3a0262a212926091b21ffb357e7b7a85a4acec93a568a282f754f8b2d. 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/JPY392301312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049a26def9032aba7b8dbf5a6df223501328711fa3c78bf42209d8e6ea9b7c4a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPY392401900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c22bbbbfa3c7b3fe9078938bed95f8b5daf3997942b708a594e60c83194ddb5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPY392301311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e2b3c285c64cf2a4309c402699ab1d58593d5274f05bf472e06db97c994e83. 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/JPY392402025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcf8021696e24885bbce3a95d7e3e89b5b4f884f765140e6ccf01b4866a894d. 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/JPY392401866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4e4b301e092f623188e21b21767077f843cd34aa0ff4f0f134fed2cfd3a67b. 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/JPY392301657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa786bd796d54ee3c2398f256dab141c4758cf9bac0e189c30b55ff4f1fc189b1. 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/JPY392301462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed580cc7bb1467a85f4926887f8f3c520adecb626229e41e36e0babd25161ae. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/JPY392301340.
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 0xa2428cf78c3c0765ff1bdcb136011490c371afafd5b2cc63722f83998a61e325. 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/JPY392301522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d0c2dabe1a93fa522e43d724d8f8c41ebbd1509f3339ea11de729d32deb796. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/JPY392401823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d327e2d5f28925b6c073e08c8ce35652a1beb65f11194910931c464d55e564e. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/JPY392301578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc266d2c11f867c0c677daa4baa7c984ab4202782600138867fe044db3177afa. 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/JPY392301255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d06eac746e7c8f2fa339ee835b7c61a0000ce6706af4c3547cdcd7b65fc422f. 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/JPY392301600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc08fbedc9778c664d31dab7a91ee41c378c97dced8acf6a0648a66afe75c81. 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/JPY392301164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2edcc66d54e7b154fbab5c26c389065cd8dc7a0c9a36e9a87f3174e9b8a3ed0. 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/JPY392301601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b130de88cd3630d82b6cb4539b4c87985c5a2053127ee9abbea9a89d9a1d848. 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/JPY392301579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d8485ab4166c811fa295582ea9a334753079e090a002c9a92c2d7fbecdd4bb. 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/JPY392301022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a002775e14eb7d444cda0ee9a267b6e4fd71179ce75feaae8d1090bbdc47ed. 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/JPY392301208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a63d2e7c0ac46e940dda7d93b935678818c391aa4f477d689834cdd3ef6e6d5. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/JPY392301525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa006efcf76d35b1e7406601ee5f5d48b87b33108883d70c89b7f41a9a83a2c86. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPY392301705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb5feb765c2577c389a8b1f5116dd65cf9e012de3a89e7c2edbd8e28150d4b9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPY392301319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59655c861bea0312da699b596cfbf5fa36405ef77b3831f4374e22d2c50a454. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/JPY392301378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827fcccf6d065f587a34da2eb3cc2e8ba1d1103f9b91943b7b8fd85b0705926d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JP92Q2401215.