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 0xf05a9c28acc1715d5db77a5c18df01a5c4b13b263350c2a7ac7414b2b484964c. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/916f00fa-a95f-4058-b11c-270557553bf3.json and https://artists.proofprofile.net/proofs/artist/916f00fa-a95f-4058-b11c-270557553bf3.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 0x62a5733eced7530a97c3dce3e3babb5c19e195c06ba63b9c8de92dbb8c28da6b. 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/USWD10835318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe310bda485812beb71b0d77beccbb655f8d271ff86380c6b72e508f8e095f7b6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USWD10835319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8596ffa584ed8096f3d2d9025db1b1befcc6fdb44cb698e9e5e74e2a51071ffc. 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/USWD10835320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a925f9e6f2b8f3112aebfaa4b449bc7b575c65bcad6ff295a64f569a40b121. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USWD10835321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a8e7df452cce9c2ba663bb4669c7ab09e45a9d7c20b676d2c89a71e012b1bd. 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/USWD10835322.
Largo (from "Symphony No. 9 in E minor")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd02ebd97fb0d30129500aff2b060aa2fe4d99ce9de58c7b03a9c43bc5fa848. 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/USWD10835323.
In the Hall Of the Mountain King (from "Peer Gynt Suite No. 1")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb533ca93840e07dbea8114e0b054d7fbc548fe4587b9d85dc4e127d11d475095. 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/USWD10835324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f2a7c09ccde805cc5635c97e546d438bfc2aab1fe5f2e385bdd487056411ac. 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/USWD10835326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8118a9a3182989f4c6fd58af504680cafc9adad6522edee6bf42487fe8aefb30. 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/USWD10835327.
Menuet and Badinerie (from "Orchestral Suite No 2 in B minor")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987dd4875d32b94dfee7560ecdcc3f8afcf64df640533284dc2cd3c363a05c50. 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/USWD10835329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2796bdf1e23589517d2363a7c6159e059e8abe061a91d1a35b5085abe1103348. 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/USWD10835332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a5733eced7530a97c3dce3e3babb5c19e195c06ba63b9c8de92dbb8c28da6b. 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/USWD10835318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355dd034920a101a8d8d50cd6ac8c7d6228ebd302044ca5e3a2371d7a47aea50. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USWD10835325.
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 0x854059b4c746daa78096a72abe8baa41522da4b37047490b29723ecc6a21c549. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USWD10835328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa251a1d93271ae099cdd327c5761284dac2f1dfe7e24524cc4262c96864c538a. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USWD10835330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c25b194454f509864805ffaae1cb72ea2833778520edee3ff5bb84f38f70953. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USWD10835331.