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 0x083af69b0c54c353a7f5d082e2e91eb6f3439c4a7347bbcd25ce37fa0d2d0521. 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/0c318431-877b-4d55-95b4-42f9a681964e.json and https://artists.proofprofile.net/proofs/artist/0c318431-877b-4d55-95b4-42f9a681964e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Splendid Jewel: Choral Music of Stephen Paulus
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 0x90c83de489ccab7e8db5e7107e7037f393ea4fb04ee540c57a9f091b0f824ec9. 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/USWSB0700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a73be47effeaada4d6c11551fc3e519e2e00fc4f18c3f1e221744820db7bc9. 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/USWSB0700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6817b62a6373c82a44b800955925114908e0625500ffafbd9eae464e2b354bcb. 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/USWSB0700110.
Hymn to the Eternal Flame (From to Be Certain of the Dawn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe6b4598c021a2becbc28c046ba580893c54f4482214ca638a9b172ad7ee9de. 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/USWSB0700112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5b8842aa98575a66df671f1567e5bd4fe1fac4cef76900a12bc605e910c88a. 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/USWSB0700113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59591de91e60f09bec34b043a2e51a3c827823ffd61f61aecbf0e0fa1361755. 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/USWSB0700114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09873d61b21f8d931bdb6cb871c5e70387e33642642c90dced571667f5726155. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USWSB0700102.
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 0x82eec6cd9687d937a8d6da9b505434af64949fb757051c0a64d6e8bede2479fc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USWSB0700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848a3b09844d6ad65474d7172bdebab5d6499758329ded193882c76777bcf16e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USWSB0700105.
God's World (From Four Songs On Poems By Edna St. Vincent Millay)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9034bf3253fdb614c0eaa19ccc72e01e9495708c17428c86f5d3820b8b113fbe. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USWSB0700106.
Kin to Sorrow (From Four Songs On Poems By Edna St. Vincent Millay)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3dc338b31f0798e6906fb0c7e294f58e8d6512affd988f9ab5a4739847a77a. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USWSB0700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4748db2a62109fb2223bdafeef5d0c1c456704fc7f51b52762c3cedcbf1653. 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/USWSB0700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9d41fb3d52ba00f7c71138923c2c3499202a8c8aafca5ab89d779cbdb5bee2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USWSB1500102.
Three Whitman Settings: 3. The Last Invocation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4e203fe70d3b07e135cf4f6668123b5c1384111e3b0cdf593223e708209813. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:43Z), 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/USWSB1500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1216c80de448be3849dabbba60f8821128379d2440a0e04031d3448568420798. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USWSB1500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce2c15aad9a5629a979e232c4016748b46f787d79a5416f2cba55fa33ac7648. 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/USWSB2100103.