The Classics were an American vocal group formed in 1958 in Brooklyn. The Classics first sang together in high school; two of them had previously sung in a group called The Del-Rays. In 1959, under t
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 0xcffb7d4d55d3a5d5e0ff677510e3cb04f88beb254bb29d14f5ef76ff8062ab8c. 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/8d190585-7a3f-4d58-806b-000c21cbe90a.json and https://artists.proofprofile.net/proofs/artist/8d190585-7a3f-4d58-806b-000c21cbe90a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Too Young / Who's Laughing, Who's Crying
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 0x617452961fd37147098e07fd6870602b4253dd39a7197c473f4de66a9a456b6d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:10:48Z), 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/NLA340923175.
If My Heart Was Your Heart / Dance in the Sunlight
My Song Is Like a Lovesong / Down in the Mine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362a03cff58965662772fe678bba15c7b5937a6405b8dc82c2caa58c4646adc6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLA340300054.
Wings of an Eagle / Be Careful with Friendship
Lookin' in the Eyes of My Melanie / When I Left You
She Did It for Her Daddy / Is It So Hard to Be a Millionaire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2c09fa726534e91ce5acbc139e74676408de556896280397fcd7a6bfb5db53. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USGZ20819198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21855c937a40924b1ae7abb03bc2160f0e40144bc3f2e6699a88b63f8cc4f209. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USGZ20819210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8be713580c7bdc98cd25c080333dcf8e8e9b44cb5d76797b7bf59c92439b85. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/NLA349500145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26df7aecdc63113d4ea653bdec62860b277060fdb8a72883a93fa0071c836f22. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLA340917651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc58f6f22690381002dcf152760a844b7b97055482d912ae605d0e6c8ccd172. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/NLA340601405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13934ecfae1fe9de009237939f8f052e03b6ae93dd9d16a0e23eeb8ee2d8cf6a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLA349900308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7f81ea460f4959f16ec2dd13d4e603f74a9bf3b6338661ba23214a75d65964. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/NLA340924806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cb0f0b1df5716821105af9346c8c786e093978de406883c7367e68f4c43eb0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLA340500326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0621cd4a9d1a6887a530580af888f4e44ded1c4d72dde667e9a0bd9085dbed47. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:55:47Z), 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/NLA340601399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6c06ba6786a2745eb84d04e37ab65d87ebdf65e4eb2e606cfbd8789f87686b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLA340921786.
Baby You Gotta Be Mine (Original Maxi Single)
De Gouden Jaren van Telstar: The Classics
Skinhead Train: The Complete Singles Collection 1969-1970
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab31669fbbb725edfaa3428328dbef31a34f9b150c57f060e59a58cd7546db4b. 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/GBBLY0900787.
Sounds of 60's & 70's Reggae Hits, Vol.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04f6994fc6cc12811e0506d6ca6350a46adb3b33827ccd4165a4403aaeed3f4. 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/GBVVQ1902382.
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