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 0x8fef5695a0f0427e0245ca86174c35e3bcbb4d94d498091dfb601dac0a4b8c8f. 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/543d0c2f-0807-42b8-be02-da664db11b4e.json and https://artists.proofprofile.net/proofs/artist/543d0c2f-0807-42b8-be02-da664db11b4e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0fba77856006f6a558b89e9a644483b569854014d7291cdcfc339bdd140cce. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMBZ91351977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4467b80848db6f74b1a66b97921abbe5c2ea12134a6b57f2fc6b51c75d55ec. 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/QMBZ91351979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295787fe9aa9beb427b4bc96d791ea4d5a40e6863fad7b6e2172591afab18b58. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMBZ91351981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b5851e883bfd9628c74f9d800eaefd3dc10380de9a17261987a228e6970f8f. 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/QMBZ91351984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5b632e0d9e3b31cd35d21966d7d41f02aca082aa612b0f5cae64b64ed78a95. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMBZ91351978.
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 0x4b3b3a137a477b9b2f8b816e05a3ba6d61b852aa487795e86db86d069417d95a. 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/QMBZ91351980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5e48a2be3847e11707d3090d6baa31ccd3af34357fd241e6a2aff177429755. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/QMBZ91351983.
Over the Rainbow (From "The Wizard of Oz")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd763c892517fb1a2fbac136e586d56de87a57a08781339bb85260265d6da526f. 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/USNLR2200579.
Seven Brides For Seven Brothers (Original Motion Picture Soundtrack) [Deluxe Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04e01edde1cc37d9db4b804c5c0a320958c7280f33ba4f298374cc582376ebb. 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/USNLR1701182.
Aba Daba Honeymoon (from "Two Weeks with Love") - 2006 Remaster
That's Entertainment (The Ultimate Soundtrack Anthology of MGM Musicals)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7a2e687a9a048b2f4fb92c2256caedfe5ea91c4149d79e624efeebccdf31b7. 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/UST1C0100345.
Get Happy (from "Summer Stock") - 2006 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd833784fc7dc809ff1ddd8d3a6c5f2dc4b9163fd416ad01119fe8af45ea7ce24. 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/UST1C0550010.
I've Got a Feelin' You're Foolin' (from "Broadway Melody of 1936") - 2006 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f44d73ca35be9fb3861cbff04927de7b9ec669d22da71e6c59d018a498425d. 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/UST1C0550565.
Puttin' on the Ritz (from "Idiot's Delight") - 2006 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaaa4fada8f8843f28a062aef896114676ba8aa02adfaa7edd61672d156fcb66. 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/UST1C0101994.
Brigadoon (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f2d7a79f7dd1b663eb37117e8682fb956a1fe7feef3acb87e965f029b7cb75. 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/USNLR1300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4326025b500049118f537f1653aa19d767927d379ecf5c5f59924c94b578aff. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USNLR1300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e10137a3f07797fdeda52c46db94d0af71f090ee0193b2fa7a5453e66af3b3b. 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/USNLR1300070.
The Varsity Drag (from "Good News") - 2006 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae92e744fca34e2442685bf15a8630a8d0e72cb602a717075242129974798384. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UST1C0102413.
Going Hollywood (from "Going Hollywood") - 2006 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0846dac7708164f04103ad0133d75ca584f6f94326d68f2e96b42feb81b3687. 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/UST1C0101064.
How 'Ya Gonna Keep 'Em Down on the Farm? (from "For Me and My Gal") - 2022 Remaster
Judy Garland: Recordings from the M-G-M Films (Motion Picture Soundtrack Anthology)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8751da2ca42b9b6a28bee6275f84df443cee1a67328fc3b8181324b6ff2f8e5e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USNLR2200604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736013886ffab599c75c5187c2312d15c6544da84f0f30d11d34ca3ef1a3aa6c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USNLR1300071.
The Trolley Song (from "Meet Me in St. Louis") - 2006 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce3c622701b1e8b1fcc2c5d668cb96daa10588a330a14d1979b666026e6f106. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UST1C0550011.
The Boy Next Door (from "Meet Me in St. Louis") - 2006 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb6a8ced04f7d86b4eef3901ea1f75b9f8104ec4f71a42e3366ad8aa770c191. 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/UST1C0100573.
Do the La Conga (from "Strike Up the Band") - [Extended Version] [2022 Remaster]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc176235d1293b4c122752f38bac6bd74eb9dca280870254d47e743d76daaa9a5. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USNLR2200588.
Minnie from Trinidad (from "Ziegfeld Girl") - 2022 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c55a1148a763b6099825969379767aa40dcf7833e7e61a28ebcafbc81e4239a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USNLR2200596.
Gotta Feelin' For You (from "Hollywood Revue of 1929") - 2006 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2cad35eb59d5a3e1f0920e506b05533e940a94561c89c2a6c67ca9f7ccea78. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UST1C0550549.