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 0x0a7939df4b281014244d9bfbc93bd5b2c8938c612d188dabbd59f7ae54fe8a29. 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/8e4c4545-7cef-4f3b-9b8c-f1131a1a74bb.json and https://artists.proofprofile.net/proofs/artist/8e4c4545-7cef-4f3b-9b8c-f1131a1a74bb.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 0xb65933ccb4979ea53ea385befc8f7f867a3033871aa31c3bc6599c87c9b6a72c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USWWW0201358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ecf141e4ae0108a0e3ee62288400ee97d0b41cb72e721d07497a7c3ffaa404. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USWWW0201360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71e1900e5596b8637cbc5ce0a10f95660d481d06cc4caefdc10f9613c492806. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USWWW0201361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cbcd880b276c0ad98ccd24a5e629afb32380bd9acf3bf5e164212de1a063e0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USWWW0201362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe9f45bdc4538d17372cb6b697e90bc3a64046c31b93aab263ba2dbe43ba606. 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/USWWW0201363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2161902e268e82ffc6fdcfeea6eea28537a1bffccdf67e1bca1056f8c80273c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USWWW0201364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf412466cd9dcbf12f6ed80220ec4a185a0cae27a0c3dc70bfebfd62a7ca574d5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USWWW0201365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06cb1c6d67e541485899c0da92e2de1ee5009c5e26fdf274e0f021c69963448. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USWWW0201366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4608b7ac25bbe0689b46b8c5aaaa6d54b9bfd0fda9cd19ffde3584072d8a1d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USWWW0201367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce04df7291d44ab2ed847768ea6df27f6cafce4db9955e751e94c633f40ab39a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USWWW0201369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795f53af64ed84e626be8e90dff12db5608cafa740adbe57aedee5a977ee5b43. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USWWW0201370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2c37e2189ff3a4be84b6b25c5761cd292e380d8f22996c7fd1faae88d19a57. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USWWW0201372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5567fa79886b1cc91f151e320bdd07874820ca0bf9febc66f79bd13876323c63. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USWWW0201435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ef3f89ea51b1d4af2057211192e7e0fb34415fbd389ea5137c31a4e3f3c8e3. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USUM71213172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de2bf13510dde15fc3f27b016a8fc0318d69bb8e5910b7935615bd85138c7ed. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USUM71411866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883b1d317312a35109b78098fab7056d8da9f0bf740e4fbad7ee5892ed8245e4. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USUM71411874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41905f06e4d905905aeb22834f5358259cf7cac0c4869ae0d14da1693daa2b8c. 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/USUM71411875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad5dcfe6360167b07cb09fd6ffb222c4c232f58fcd4bb50fd9a8d2f81e050c1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USUM71411879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd1f4354dcd42451c8132ae014c58c3c616fa10354e85afb815c349757bf9c9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USYBL0700383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6404b43351620cdaaa4a23034dc33d0d9799bfba13804bf10f31ce6453276ed6. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/USYBL0700384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21fa53b0a570d4119d7df8fa01ccdeed20ca34f9187547df34a0f138aeed797. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/USYBL0700385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f52f9f1c86444bf1cde984224e2395685b50f0e594adfeaf98466495b986c86. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USYBL0700388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72d9f48e6828dd6ec7f4bee073ccb8cb13b27c7860f8fb823f021de718595d5. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USYBL0700393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f5ddf038d23b2186b5d78cb7606f3304076a4896f61a0b98135c9fc35b2206. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USYBL0700395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c851002d3cf02452a5bced24e932e6714c30ca6ed0818e0203f22e6c134281. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USYBL1901632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa780f81dab9313c309bae8a9845e89c742bc685066f1768c11eed78c2b651572. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USYBL1901633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4681a729ab0ad2c1db2b206ea5f0d43a2064bcfb18e7c4c08644c27db2426c3d. 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/USYBL1901634.
More Than One Way Out The Ghetto - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e99d651012c52173bb800cc942df3773d6a7173bc64d47e206f10665d722e28. 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/USYBL1901635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71962bea1bc69928091dd3c6ae04ec9c2fc2f2f6399be2883ea52adbb6ec335b. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USYBL1901637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cf1a72c9fac49907431217627b919164298b7fe8bb10826e17fb3db08875ad. 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/USYBL1901638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbd7e868b537116154f93132c46a986b7ecb6217acf140ad246b44d4c8b6611. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USYBL1901639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d90fde3bf64b451d51ad9db279669a2a6b3ea261d24fc10987cc4e4551610d9. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USYBL1901640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a45a1f860d1b6ea72a258874088a30bdfbc329530c97fb8bc83e0c7c9e0319e. 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/USYBL1901641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6af4a93cba123cb3f3c1cfd6bb3472ce3b43d4850e1bef16e2832f621be2c7. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/USYBL1901642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ebe682e2c3eba7cd8482e019177f4db60209ce21857d98fedf2afc91fe007d. 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/USYBL1901644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5567fa79886b1cc91f151e320bdd07874820ca0bf9febc66f79bd13876323c63. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USWWW0201435.
Buckwild Presents: Diggin' in the Crates - Rare Studio Masters (1993-1997)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f279c855c65f57d08ecff0ff9d8d862bac9b281e0e72ef6c0145b5f2a2c48e6. 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/QMFMF1557176.