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 0xa68cafc5a59bc9276371a65e0715f6e0bf73bd5921ffefd3d8c15ea310b173dd. 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/9e467a86-c920-4292-ad88-56007ffd95c9.json and https://artists.proofprofile.net/proofs/artist/9e467a86-c920-4292-ad88-56007ffd95c9.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 0x8f17735b874e120284e729a76dba312633347bd2d04bb79924a7dca1746693b9. 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/NONO22001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685d68397b763eb06aa400f41639b19fe41bd3a7a95e01a7c7b5f58ec1880979. 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/QZES72415711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dfb7e0e055d4f67df6c5f973ba624cb4bf5956f845a7a891d554cc9586cf64. 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/QZK6N2324146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6219c8b55aba81740f1ee645922c1bf4677bce4fde463b59a11e5b5f3c666863. 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/QZDA52304229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d21fe03c3f834cd855bf742bb21c4e8292033448b835a964d0d9ecf6de510ae. 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/QZNWU2208589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2543998b11355c94142f5844413c9e7421e0e175185a2affe36a9206a0e04bcb. 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/QZHN72226953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4c9fab0bd42403c4c2b3164a9620d4629d44ea2ba99d740c8951c9f59c59f9. 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/QZES52280304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8a2c666b4ee2b701273c09a50ee1269bf6f73cf7ce0c4aed819b7291d78088. 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/QZFYX2288873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a033f2082aedc58abf95bce995e48b14d953e2bd58b53eec747493b6db9dbf6. 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/QZDA62189127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698c7b3c6ebd59e26cb09132edf4541d6dac79ec5ae03da4bdb1b14ade94ea8a. 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/QZFZ32116463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075e46c4f691177703087b34bc44b19e0950c4c523def3647139905068ca258b. 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/SE4W42000301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5458ef4e9a30f2171501b791f59cfb6adb958245493330d8185f9c4b5a1939. 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/QZHN82095111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa9af6c63005117bb962b4fac63f72229615ef05ad9213e238a13e9ec3484be. 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/QZHN42059072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf67b00cefdb210e1915d99232ebcf74ae7c5de53dd68ca73ead65116db184a. 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/QZHN81935395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31095b0116bb6de98cc587876a74d4755c99102e30f7a0b635cdd0fe66b6dcd8. 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/QZFYX1978007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d63e6fc140ca07400bdc0fee23059893d1f202fd7a4851610db320439ae7991. 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/QZES81991032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde36df25dbdaa559d617b0638a3fcf761daa09f8addc69a6fc8f12a5427bdae1. 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/QZDA41949121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ec271515935b50f298c0b53ecb6ff9c1b55437e37efdd1424e6b688199d1e2. 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/QZES91823862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae614d220cfabf84834a19d14956f40efcbc521606f5126e741c1dce1e9f7a3. 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/QZES51848822.