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 0xbab650f583381aa8a707cf66da692097046d69984072b06f200220a72a8d1bd2. 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/40c5b9cb-7b80-4d14-a695-88fba3c20826.json and https://artists.proofprofile.net/proofs/artist/40c5b9cb-7b80-4d14-a695-88fba3c20826.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 0xec5420e07eae7469bbae83db33f429c049f02035323c55592ac33601e4ff9ad6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBSMU8687220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f58c1b411f4d82d17e6418fd43a73d0cc7222b6ea8b0ff6a329172d6215e88. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GBSMU8374918.
Slow Blues in E | Guitar Backing Track Jam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5797379fc75588e39799012cb8770b4a99ac7f7daa43bac9368abe005f03ed6f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBSMU8687222.
C - Medium Tempo 12 Bar Blues Backing Track In C (98bpm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a867af87a90c31bb21adaebd6af8bbd13dcadd9949db03e1747e91d0a5d29f. 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/GX3HH2162653.
Shuffle Blues Top Guitar Backing Track in E | 128 BPm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a377d3316927aad59593fd2948c311a5d5822599c5733dcf26e832d412aec8. 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/GBSMU8687221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283ca869ee958c088a2f819cd6ba6f270c64a3b497baed09b59c1ce169e80205. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBSMU9071606.
Sad Minor Blues Jammin Track in Em (slow)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ee7a9e78cb69515ee08cbf785f217b73604aa2530e0e7d787de73ea360568b. 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/GBSMU8687223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40556d57b66f40f7bd4587c82aed5763e88876715219f44dd804cb4f54daf60. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/GBSMU9071607.
Sexy Blues to the Bone Backing Track in E
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6793f842b2c9893297a0ae3c3de1951a2f61708941022bea2f1ee48f22307f. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GBSMU7736778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2b0f081ef0725008dfd59c151813c803b8b33057f5899995e324f5877cdce7. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/GBSMU8374920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84393885650b0c6a6e1f20c4c887c18b164d8838f0c730a7fa42f14ab7069f63. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU8374924.
Backing Track | Easy Chicago Blues style E
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eae5b7c1d2eeea069acad453f7942516b36eaea5552341af7d1e88f047b4bb4. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/GBSMU8687225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39bad85d7213ccd68a96be48d0ed054e05f1eb1c52546e66116a3a83d0fe98a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBSMU8374919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0774e0303bb0cd069f5eb0261bc6d66b16d429a73b81b07cb750d4a38d0171bc. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBSMU8687228.
Chicago Blues Guitar Play Along in C 122bpm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b958b9a627fbcdb19aa3438700f34e6344d92cdb5114846f1d101033531e56. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GX3HH2162654.
Slow Blues guitar Backing Track | A | Easy | 12 bar | Beginner welcome
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb43da3f4cd671c55c1af6db4a5c850bc860c46f1022cde931fec5c3dd91bf4. 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/GBSMU8374922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ebca90b3bb1fee632f12018f2df771c2de8febd668198275dc110957c11b07. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBSMU9071610.