REDIRECT List of Playboy Playmates of 1975#February
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 0x7749e745bc917a124711adf5c1fb36c35818c05db562898dd572e7686893b565. 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/ba2da259-14c1-4d49-9a1b-be3747369f08.json and https://artists.proofprofile.net/proofs/artist/ba2da259-14c1-4d49-9a1b-be3747369f08.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 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 0x74f36c73b6aa7a87873585d9d696dfa8f23e7ce8fa34aa8f00b375b9e0979697. 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/GBBTF2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19e733e9a6aa49864516be8948cb09fd862e02d58ab511fb8eab02128f1615a. 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/GBBTF2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50a963a7aaee73f04b3467f23de0310a6b05923246f50132ff01cd133a61de9. 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/GBBTF2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2606d68f5f7fd6f103123c7a47b0f8d83b91248747818194f3e9e66e93058b9. 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/GBBTF2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fe896898692298936c463edc453fdc91f038ed95297235f00767ede0e9390e. 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/GBBTF2300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5baa77cb9759c80ae17bb872bd6f9f92532c54bf5050949706d97070013b4d. 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/GBBTF2300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdab765acadd11061c6930d31e773e1e912b15be8354249383bff992c421197. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBTF2300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc753bc3cd0f373ad37fb7be8bbecb90cc7f10d4ef3ca36e2457d1e6fcf6c3592. 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/GBBTF2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed30049b6b060ba4a22c094e8a33446a3960075826232fda3803bb5d5b86b83. 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/GBBTF2300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b01cbc81cf20ed06f97976b2bf99c8ff01ae4d84fa867a90486800d943d8de4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL1946917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8df3a8ea70efd1237d250b03bbdbab66c0026ac6ce4d2738025d89a412d3d1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKPL1946916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852674e91ce7f3b52093ac97efc34c46aa6761d56b26f274a71d09faf5f59dea. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL1780287.
Lagoon (Earth Variation for Saxophone and Voice)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ce6d3a4a1bcc783252e3c11e90ae67e796f7a92cc26b38649cf97511ff70b8. 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/GBKPL1817419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50446ae3fe55807cda24df2f7f56425dd5eff0edde3c044ed8d30865ef1bd571. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL1897222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0280c051c3e7a6348c91b86714e8c9ae11ef8f2fb9a70993843578cf4fe632fb. 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/GBWWP1602076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5954ee67299bb27240cf4a23941d74755d9374f7e16dd49cf31e0dbdba54ddc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBWWP1601981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbcb88e18957824e07be539ee22c863c0a69efbd2cad77ff034ac9a7ce61765. 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/GBWWP1601982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df72eb0679ac52894cfd9e85dd6683166e8057a5e0f8921474650e311c89c27. 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/UKDBM2400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51840d8fcd9f30937d6c085c31c290fb863e75dd4c40f16b47116eed58ce8edc. 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/DEG932401960.