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 0x40feb2fdd9e08c743b33f59d5915c0a8a0a7dff51dfeb719d1757512ceb408ad. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/995a5e9d-2ce0-49f4-ae2c-ab26cf5149a5.json and https://artists.proofprofile.net/proofs/artist/995a5e9d-2ce0-49f4-ae2c-ab26cf5149a5.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 0x6866e5740cad5fffcfa1b54dce02ec8b1bd01185664492dea17bcd72c3091cbb. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZDA52200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc499eb34804377ca3b103835994edac827f5ef60ca1de4eab7346ed0b3bbe10b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA52229700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5129d6995829a65bb718da1f0114e56c2ebec6e097afc1bde0b130d34ce794b9. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:21:39Z), 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/QZDA42225010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dc95e149f417d1ad70cbca87695b5155d827d984d3644b02735e894a1c114c. 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/QZDA42226642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9faa672fdb95ff9a2d0c8149dc84e11a03088b439d23b34709065d095bdb617. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:19:40Z), 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/QZDA52203055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30a4706958974edc4d9a629dd43e526f819ffa497496eb99c1c90919baa683b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES72205492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45ae542b4573fc77c4d3d8f14ba196b38b1f60376d6c4df19172feb4beb61e5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6L2214619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b8250273b90ae1fc00794dfdccd5b6075694a7fd3a8830fa45dfe6867761fb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6J2288877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7388658e8260cc433563e23cc4d24e43c4d4b7380f2283a7f7a4f46daea16707. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWT2217006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a7c7a81456e7b2c918a8b1f21385097c5cab8117fe37d91ef189d0cde10557. 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/QMDA62236369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b7e23dc2f6d02cf6415e9db3b3b6bf610561e2dec18cd1be2ba4a229d68813. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZP3W2152623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d109cbddaa58826f8f0d460ee41a80b82909642483065233a014d96fb27c9dd. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QM42K2370562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88c919ea7557b11575e9557f383632d6d74f6f0bf1bc59e5494019c9c55e4ee. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM4TX2387313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bbb6b7503d8438a22d40df2c427ffe32b615d11e9bac9cee5a5556984be5ab. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWV2363136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365952fecc473f84c9b90a41a55c9f3b21b42c9395d9dda2d48a9510ac826414. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTBA2361488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd894b6d82350053a6280aae0122a1730e6e03ad98f1d9e3711dc58ed3e80dff. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZWFR2384264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ce4e6473104081824b7b76d1c46490ee8837a407bb044c1381885e9e464bbc. 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/QZFYY2413840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e43755f8b543b0e25acd2ba4cbe675b3ec81379b74784a70c5586599ca9b5c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWT2438420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8ca6bae5d20f0d8f42cb94283c8f24b16691564152d82ccb77598663dd108a. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZK6P2524300.