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 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 0x5335c0ce25dbf708e830da0c9a45692f1ecbc694315b5a4cf10905ac5c884f83. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c83833a-b5b6-48fd-9a6e-1d4fa68c8224.json and https://artists.proofprofile.net/proofs/artist/7c83833a-b5b6-48fd-9a6e-1d4fa68c8224.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Amphitryon, Z. 572, "The 2 Sosias": I. Overture
Purcell: Theatre Music, Vol. 1 - Amphitryon / Sir Barnaby Whigg / The Gordian Knot Unty'D / Circe
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 0x16172a936545690a0ac694ad9c0fee9abf2320d7bf6ac3da8684f169d512b331. 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/HKI190744801.
Amphitryon, Z. 572, "The 2 Sosias": II. Saraband
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79506a457d9ad975c07ddc267e2983bcf34861f1cc868a9540446ba65b9afe2d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/HKI190744802.
Amphitryon, Z. 572, "The 2 Sosias": III. Hornpipe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef708a5d33df562c74fa650cf657b2c0002811cbb2708fb653c5c89a0eba92a. 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/HKI190744803.
Amphitryon, Z. 572, "The 2 Sosias": Celia, That I Once Was Blest (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1b4989941839f3b263b89e356a0cfb7388381339e608e8b2de72057c32d861. 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/HKI190744804.
Amphitryon, Z. 572, "The 2 Sosias": IV. Scotch Tune
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16488ab45253b58f484f87dd846726d761c65d79ce0b840d80f4cd63b5334593. 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/HKI190744805.
Amphitryon, Z. 572, "The 2 Sosias": For Iris I Sigh (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed021c2447efec5fb44ab2320f14fb241db4fa7cbe45828b029af33598c8b74c. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HKI190744806.
Amphitryon, Z. 572, "The 2 Sosias": V. Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d4af87c1f99deb90055c68fdc2ec9b067d487525a76abdeff7fd7f32ec4d2d. 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/HKI190744807.
Amphitryon, Z. 572, "The 2 Sosias": VI. Minuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e869748c314fdacd002dc357ff0b0e883727e2a01af14b9e7e28350f388f6f. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/HKI190744808.
Amphitryon, Z. 572, "The 2 Sosias": A Pastoral Dialogue Betwixt Thrsis and Iris (Bass, Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b98ec02038c00c217d51965028a2576923b0eaaf8864983564146d59cb8c8fb. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/HKI190744809.