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 0xdae7930d2dcc7f4ee39285dbd251ab78155609e181f89ce442978bc7d3099238. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d34d9fb7-c9dd-4fe8-b15c-7fe31b760d39.json and https://artists.proofprofile.net/proofs/artist/d34d9fb7-c9dd-4fe8-b15c-7fe31b760d39.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 0x13003169e68cdccc08e2840ebc86b59d0a6ffc0c80a8efcd67ad7051ca43f8b6. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/SE5Q51900752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb249066559349f47d3c7db9997638ee160f06cb982d0cb5226e971f223459005. 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/SE5Q51902330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b66403b8eb6b3695689dd6f9325d06b7c756ec9f9bbc0dd9cd01f1a8e0a881. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:36:33Z), 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/SE5Q51903267.
Building Chemistry - Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34da8a01f40b0a7bfee419148b6acfb6131e964b1d381d4e506a9161cc362793. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/SE5Q51903053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf823c6362fa4464838ee55736f2f20e3ee2b64ed2064634b54a865cc1696ccf5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE5Q51901286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a28865ec1856617e29bc9815bff806f038c090addb071f2621b754728a9b1e. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZFZ42059761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c052714af6adb6461cf7111f3337928b21c45a204c104e110b564be7c7247d. 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/SE5Q52001204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ba7b51a491c0554ebce23a80fb1e16783f1d8e5b685fc932a04c4b4884a9e3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:05Z), 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/QZMER2071873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fbfdd5a7b6d0646995b1dcd668ecc1348216a7d7412989798f4c4e5ac5771b. 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/QZFZ62131490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0bae978f49dc073517406e7cfab73f8de0a24dba93e811f3f16b58bcfaa676. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:25:58Z), 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/QZHN72237170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3efc36cf996f34a72a118ee21a9432754437a0acdf1e6f56494d9704e67d8a0. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:54:25Z), 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/QZTBE2361929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31fc4a0cd2518f8b710980260a9772e365378d646d36ed692c7f29253cd4266. 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/QZTB82447299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edf52041660c64840bc6bbe6c5ee2f08ba613827be7da7c60f929731e13b463. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZMEQ2581198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b06bbfe75659377f5cf95e815514aea85cddd748c01771630753c415cd260a7. 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/QZK6M2455021.
Indie Folk Central: October 2024 (Autumn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31fc4a0cd2518f8b710980260a9772e365378d646d36ed692c7f29253cd4266. 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/QZTB82447299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27e09e923c0351745332af07d175e49ec55112af3e117bf8180aa4a5cdc0e50. 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/QZES72333128.
Epidemic Presents: Crates (Blanka Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134f1ecf1039278f62503e75ebac6fbdbdca9b2da52a673f7ea52e0e1b20924c. 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/SE5Q51828689.
Best Indie Folk of 2024, Vol. 3 (Indie Folk Central)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b06bbfe75659377f5cf95e815514aea85cddd748c01771630753c415cd260a7. 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/QZK6M2455021.