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 0x03726c7b1acefc82b0cfd7fcb976658d1e4062c16deab62931d52b113efa33f2. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a38aa7b2-61bc-4101-9e27-310fdd28421e.json and https://artists.proofprofile.net/proofs/artist/a38aa7b2-61bc-4101-9e27-310fdd28421e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Britten: The Turn of the Screw, Op. 54, Act 1: The Welcome. "Mr Grosel Will She Be Nice?" (Governess, Mrs Grose, Miles, Flora)
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 0xfa35f17968f4278920e84397187230c6ccb47b25874bbab17eb57e509ed11d9e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAYC0202238.
Britten: The Turn of the Screw, Op. 54, Act 1: The Lake. "O Rivers and Seas and Lakes" (Governess, Miles, Flora)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18532aa399dce31ef2c88d61718ce621b049a65d102363864404530a88f38e4d. 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/GBAYC0202248.
Britten: The Turn of the Screw, Op. 54, Act 1: The Letter. "Miss, a Letter for You" (Governess, Mrs Grose, Miles, Flora)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fa065e0aafb3291b9f6ec5a7083e937e726a399dd4f2b448e52e43a294d10d. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBAYC0202240.
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
Britten: The Turn of the Screw, Op. 54, Act 1: The Window. "Tom, The Pipper's Son" (Governess, Mrs Grose, Miles, Flora, Quint)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ace253c8ca21b7a296306150f570d60035886a108a8ea8ea7448f91d1d91d7d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBAYC0202244.
Britten: The Turn of the Screw, Op. 54, Act 1: The Lesson. "Many Nouns It Is We Find" (Governess, Miles, Flora)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4fe91369f9775db9fe2a8215a9163c5acbd5bc142710d8013ff76fa78941cb. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBAYC0202246.
Britten: The Turn of the Screw, Op. 54, Act 1: At Night. "Miles! Miles! Miles!" (Governess, Mrs Grose, Miles, Flora, Quint, Miss Jessel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303c3290359377ba205baa3bbf6219818ea4038b26603cf5e34d99ca1d4e67b8. 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/GBAYC0202250.
Britten: The Turn of the Screw, Op. 54, Act 2: The Bells. "O Sing unto Then a New Song" (Governess, Mrs Grose, Miles, Flora)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25aba175a555dafb29016d9c7ac3ee173e614948b7e359fa93ddc14ed9250f2c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBAYC0202255.
Britten: The Turn of the Screw, Op. 54, Act 2: The Bedroom. "Malo, Than a Naughty Boy" (Governess, Miles, Quint)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9de7145d9b72543aff3a9d4f1e9ddb3558edf0325f4a2d3a7bd59a1f7bae854. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBAYC0202259.
Britten: The Turn of the Screw, Op. 54, Act 2: Miles. "Mrs Grosse" (Governess, Mrs Grose, Miles, Quint)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7393974d84a8ab580f52d59807663e7934edec743abae15fa220403d416a419. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBAYC0202267.