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 0x4a301fcd88f40b7fc33d45466f269e2221daa2d0e82267bc7ea4ca75e5e736d3. 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/330d7bba-91d3-4c66-9d50-181ad14cd54e.json and https://artists.proofprofile.net/proofs/artist/330d7bba-91d3-4c66-9d50-181ad14cd54e.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 0x5fe6775cbdd366683dfdf4165e39dea0d2428bdd6e42df1e389918b01b6b5c44. 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/GB2LD2110117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd246af34e20410a25659213210213d5ca19cef16ae529f9105c83d2633d6d0. 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/GB2LD2010137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd29a29c20788231acd7cf7e0e2522783a3f092e3c24af413b039cb7b5589a6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GB2LD2210299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5786a16df18b046ee45980bab3614f9c1a068e13ef584da22f0c52b1a5002a. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/GB2LD2210300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd246af34e20410a25659213210213d5ca19cef16ae529f9105c83d2633d6d0. 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/GB2LD2010137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46c4c23f29c150d2188114c8e60eab387abfc84f5f02eb8f94e92456ed89afd. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CA5KR2445766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab486dcef904e2507759735ed19fdaf9077837c4a84276365219e8f1a90b3e2. 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/NLRD52339955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af824bca64a038fa1a96375371c7e4719b7f8f7bef0378eda8b1a821d2d3b50. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZZ8B2370858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb35f2afb75aa892407790ec5d36be899725287ade262a36f1025866ad6149ec. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CH6542296146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d5e833e09ab800e146a22a40a3dfcc77b44096ccc12fc4542aadc6afc614ad. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBLV62207574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b259481034de4cd197b6676d0d75ea3ec23961ff32d7355f8272074dcf9ff5e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2LD2210285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ad14e82a0641fff58eb1262c4e53a2b6eca5abcba14438984535785e82cbbc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2LD2210197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600a9dde8df904ed0c564a9fb60eaaf486327db8704a4e725db3a26a1f50c3e7. 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/GB2LD2210146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1ac2cc9072629f73ac609ecc82dd17674fd1178781181ac654b80a020931a5. 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/GB2LD2210122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2368a8b9040c1aa5dc5ddd60b3646c37257c8c25988c0f4ba9488e03a2ba4c1c. 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/GB2LD2210077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a35d1d5627d10834ae4c93815abcd06131b4ce66c8b782b2b95b6e56f496b0. 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/QZP7F2207059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd14acfd178a26bf0834e79206b20e05a2573de0ba879ff04420991c60c132d4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GX3HH2241582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d29a291901217d80de523e53110db643e5243e6c415a98180dfda3f5ec3273. 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/NL1ZN2001237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad85bda3dc79aadae73a880955d9c6302446fb354a6c66c96bed83f2ee43afcd. 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/NL1ZN2001399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d40b1a96200dd9b761b069786aa095bc88c967d9060c8a5d38e686c71c4721. 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/NL1ZN2001238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa58b6e73549e5d3b5ca64513af230645e62ce9c877a985f31384f8cf2fefbd. 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/NL1ZN2000882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375bbc0d395752ba1997da8fc697c99b5ccab37ec781cb490e12f164e7580521. 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/GB2LD2010306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a00a8316315f2a8b8a0e9761e93b49f09b1c9256eaf43f701a9bb87e66c242. 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/US3DF2092308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748edde13be35fa09eba931cbb6c8b4b470d8c890d424a0484b8287426b9c020. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/US3DF2089067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf702f30c158b1af5faddb5f3cd1df87150afb8f73b18753215448cdda46f15. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QM42K2047462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a1dcd6baecec8f19e0b56291b1a657998c7ade36e3b22919529d46d9e9cd13. 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/CA5KR2011759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf522f0e49ec463ab393fed6f72876cc7b065fa4d86e1a3a145c4c98cc10d4d7a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEAX11902073.
Better Together, Vol. 5: TOGETHER EVER AFTER!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9fa60a9aa3262c215f77f3fd129ef0d87d02c47612f01219573a81f7c963d9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM42K2381030.