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 0x708b8b97e1535f66f05651e2185bbd699c7ec538ec90b2dc3ee209f22bb2dc70. 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/b3612e99-1ca1-4394-b60f-308160d8b83a.json and https://artists.proofprofile.net/proofs/artist/b3612e99-1ca1-4394-b60f-308160d8b83a.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 0x507287c81a1365ae5d8e7b2fc734b6c23ebed7e0f46a95698c81685d4550c1f8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEXO52434680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4480c97e6c00b5d9db6bb0d5b93ec28312bf5f58ed003466f6d49720d843285. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEXO52434681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bdf0edf64ab275aed3cdc5c0b39bf9c160996821bf8c7eb4d8396b3c5807ae. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DEXO52434682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48648e2b996111d145ae865af9577a39da3feb9eabd2209d487e9bf1ddc9935. 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/DEXO52434687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a8e8b491d51b849c13803c253e7eac5259567fc2cb154b9f91fa33713efbf5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEXO52434691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe37c6f103d4eab8426b42981239cdbba69ba60adc5bfce505f77fd80f0b51d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:20:45Z), 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/DEXO52434693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b46f63bd2a1d9be760d1ba1b6f158d66defceffd619255efcb484c3741ce3e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEBL61298715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0558c28794f003938c6eeca3740687b09e4a068d447a93307179e7cf807d3a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEBL61298718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca365d786d9d02b53a101d77b57d918558953831fe35a96676bfb3a3e3e6d124. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/DEBL61298720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb589069474cef583971dd77437a5cd0ae8779cfeb0339bd4352562440e6fe7ff. 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/DEBL61298721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a66b23122055fb9ba7e1b633a83316c3ffd1f7f803395ad289bb8c24babc36f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEBL61298722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f21a0fb82d23833cd97a73ee688445168a699b8ea3f04908fa3062d8062f79. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEBL61298726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96996f7bc4d2e176377e0cf067f2d435361b7d0f91b533e00315204be19017d9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEBL61298683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af9896064b204a6422b19a802dc406106972f2c00530f409661072714aad282. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEBL61298712.
Anthology: The Deluxe Collection (Remastered)
Smooth and Suave - Crooning Classics with Rudy Vallee
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927efdf2f3780b55437f4d6fb581c7cd37f2b40ed38514c8cc35e991aa75415f. 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/NLHR52147462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da3cf7ef7eaf3201eed8e9875d5d6aa091e0469e1305765a5bd9956931e7dc8. 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/NLHR52147468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6467bdd67218163d0f122e6a4a51e48ec362d92f2635447be120d4c3d5817db. 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/NLHR52147472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c795019480d06b54eb396e57480be91a9960fd7324b6b7aa42a06dc11a7781. 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/NLHR52147475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba830982213d534c13ea33b0130d7f3233d6577d77515fa7fae585260885060. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLHR52147469.
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 0x64bafee930b7c83980b4a057311047399e3a385cdf245bb4762b60ddca3f68f8. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/NLHR52147474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b01d247ba472d5aed645f83605be7819549f02ca6f10fbc1273f36ca00531f. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/NLHR52147476.
Essential Classics, Vol. 622: Rudy Vallee And His Connecticut Yankees
The Naughty 1920s: Red Hot & Risque Songs of the Jazz Age, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe561f966461d29414ac17d8ed65b1b18c01e00174fb0aa72fc8cd5d8398a3a18. 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/USM2U0804402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48f294e9f57a2210691112c31be7e6613ef0ac4a2d0562b4fd18af1d25d5827. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRBJU2500782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3ebc5b323b6cf7453e88d5f1483db97c25ea7326aefef684cedd42de30debc. 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/BRBJU2500783.
The Big Broadcast, Volume 2: Jazz and Popular Music of the 1920s and 1930s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8917927dd1618b3741626f8809564da216fb903e43f218533557c94d0982dbd8. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USDYP1200532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8986bdddc6b316b471b0f6df4cc44b3d18c4600199ca28fe5c84057ce2e407a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USA371133900.