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 0xfee6165447e46ca6ce422073051e38d029aeb3df68a53de970dcc8c28c6ef9b7. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2909bd83-0d3b-42e2-8bfb-a745f13dfe25.json and https://artists.proofprofile.net/proofs/artist/2909bd83-0d3b-42e2-8bfb-a745f13dfe25.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 0xc24fac35823f57a92158f5d1fbe0d22f17a18fe939aa50f7c0f93610a10ca372. 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/CAGOO2483857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30432b7763177cac89035024dd2185e7dcd6aa48028cca7cc49e9964b22ac090. 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/CAGOO2483859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4177f2ac3d3a86127de87dc6c565ff06c7768904f4ecd58bd7db0e4239bd774. 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/CAGOO2483864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ede9d576342e89e5e264fbea3e0defa11220dbdf795d2792d8817fbb9483e7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CAGOO2483866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2f101a0bb238d3e2f32ec5c40a31893c591c9e68eed4bf3054cd8b91357d1f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CAGOO2483872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2a4d810f5e3ec0c74cdfd9354d08c62af5a751c689d54326b15c6bd94df93e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CAGOO2483884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f75156b4f5d74b6056ab004b719dce3c95199d0d7b9eefa6d013717347fe023. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/CAENV2010374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601dc66baaaf04e06a33f85b9ac808bf3e1282bf947a019cc9ba70a88e3d690e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/CAENV2010371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf963a2dbf8c03322afc296d183596e3e632cbffb21242c6e9d41f54884a24ccb. 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/CAENV2010370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a78dc3ef21a824c0869c2d066b53a405eed21f8e5271635cfa94e2fcd2c787. 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/CAENV2010369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7781dd63ab00854bbad1160946be01c51285f18a66442baa1a0ee25f6e1b96d4. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/CAGOO2137930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6560974c2f2d5c234ce600fcf7514950d99eae22c56a72e70b5b5efa8eb7ef7d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/CACWV2109132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c1ed2f83a5047a9f92f05f713764786f96f90402429a3d46521b3a80f29d51. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CAHQJ2387287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952ce35295e5619c9c8e6922692e386f3e19a4149956a40f53578aedc71afe0b. 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/DEZC62377631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf867563cd25e3fd93edc7acdbe61a4ef91a14a2edf8a67ef303a5cf1a37871. 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/DEZC62385880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ba218fbef6deedf0da14ab7919c2306c2db84c603b828e5dee5899b19629f1. 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/DEZC62447264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3585718fb06cd6e791150a1abebc6e75054df04804be28271a650950d0a15c2. 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/DEZC62464818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77828f10a58645ce38e69d37bc543e326c5b17efd475bbe8275f1816c520b067. 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/DEZC62469669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910a08b9651991729b5365f76414bef6622d4ebf719e33ac0f31797548286691. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEZC62584659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9b77d70f13d60d23098635193c266558dc691379051039a96ecc3bb0c9517c. 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/DEZC62585379.