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 0x66cbedef482ac6badaf44cba4bea6067b911906d99b71dc688846a6e238240cc. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58c11d77-f9bb-4850-8892-cc03ee272663.json and https://artists.proofprofile.net/proofs/artist/58c11d77-f9bb-4850-8892-cc03ee272663.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 0x7558d1429f0185315d9d8a1982787e1bc4585253884bbc14beb7a66b443516da. 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/QZMEN2295486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ee0389f4d3d2cae9e195505cd15019a1bfc695d3eac6b7490a6c9a1315d6f8. 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/QZNWQ2252094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f0f714cdf258a41d22b7903912b1fb1fa5dce65cb8831ed99a60b1e19bff3d. 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/QZMEN2295487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed8e870c5701d2a145ce97cbf5414602c543b461a7bedfb6d446db4f1b0c26c. 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/QZMEN2295489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7188005e726352606cd9a0e7c1d4daaf7fcda33672be325cf20dedf02bf85bda. 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/QZNWQ2252095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6719dfc767cfa457d3b392880121d7250e0316d24e4224418d511ac809f628e. 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/QZMEN2295488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7558d1429f0185315d9d8a1982787e1bc4585253884bbc14beb7a66b443516da. 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/QZMEN2295486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f0f714cdf258a41d22b7903912b1fb1fa5dce65cb8831ed99a60b1e19bff3d. 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/QZMEN2295487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed8e870c5701d2a145ce97cbf5414602c543b461a7bedfb6d446db4f1b0c26c. 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/QZMEN2295489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca9f314af82caa696506a59605f095351aa4dcff17a594684e42f8fd9a46026. 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/QZFZ62065235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22274be3b1998fd45994815c5e343cec23e92ce266a058f1adf446eaa7c75b72. 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/QZFZ62065236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a89c3bd1d03fff55012566ffa4e963879c7f0a6bacede729736ce202d5a2445. 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/QZFZ62065237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05f48a00118a09058b2268795a5d218d1946478a38db38fe59df67469fc8768. 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/QZFZ62065238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a407416f30c4106085ede1e913c0e900cffbbf45b3571bfd6db291b0e3da5cc. 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/QZFZ62065239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f2112519833be3e471562f863f3bf657453074157476004d0fda79d28172a4. 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/QZFZ62065240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd644392a065534b410c309f5bbee5507d4b2e90bfe3aa95b315d08fd6144c67a. 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/QZFZ62065242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b574573f1e9fb1ed9a1b4d6cdf998f3d2111db1a541af60202f99c828317fc. 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/QZFZ62065244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c66ec458b98805e528ae1b25673ebc6796a3b7eec58e8aed1aed7f42deca377. 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/QZK6Q2144430.