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 0xfd50db0522444a4947d6322aa593327f138946be5465bb318b7585d7284c83fc. 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/b07f2687-740c-48e4-8e6e-55c21680c6d6.json and https://artists.proofprofile.net/proofs/artist/b07f2687-740c-48e4-8e6e-55c21680c6d6.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 0x8d860b18857feb8175f9b4c9d60a640a72cca5ee981fa1731faedc885f67fda0. 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/US6680916347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc485f8203ac9426845e7db45060cbc976469eb17640967fee900812235531983. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US6680916348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6059dd056c6487e73df5786ce88d74b19926f96165e50e07e022b8aba9a249b0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US6680916349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2baf1fd927e89b690b3ae90b6257016e97e7d7fff7d11da4f82be574d628d0. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/US6680916350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b86c2c67462095a81d21ae0d30a667fa5648fbc0a2388940eed5ce9ba361ce4. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFYZ2201028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ed0c8ae028bf68397b434cec9f4f480f209cdd70958e7411bab29791d7fd9b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZFZ42264555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47977a1e3cf3565ba2954fb4b0727d71f0f090b038af320ca2031040c03cf9e3. 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/QZFZ62304771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9204b0fd5021e003a7f6046aadaffcff93d52ad06a94edf57cd1b16b3e59d0. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZFZ62304773.
La Vida Es Fría (The World Can Be So Cold)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90a58f023e6506c5c9aa6e4ef927c1eeefbfe29278987300120a0b315ad01ed. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZWFT2493609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ed0c8ae028bf68397b434cec9f4f480f209cdd70958e7411bab29791d7fd9b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZFZ42264555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf9b42b6bded3a0afed9189fb3c4745a80f2d951681d441c4f30d145173e615. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNWR2141168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47977a1e3cf3565ba2954fb4b0727d71f0f090b038af320ca2031040c03cf9e3. 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/QZFZ62304771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581a1dff7f994d03ecd5914dc87e1d2297328c0f153878b41bf46384e57d2a8a. 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/QZFZ62304772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0b7be0c1a5e182a3784495b91303d5b319b3b8ee4ecbcdb1ca6dd69b034110. 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/QZFZ22582362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c8e05c7cbc517481ce7a0626a41a65821490e3cdd4ca52e0f41d8404509b5a. 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/QZHN92308124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f34aff16f204f8e3e28a6092889de25078bb0f235ac82650e3544dc0802efc. 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/QZFZ22582367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae77f132d3f7a70463f30c791fe3744633018c28ea16dffe8b00ed74e13352ad. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZNWZ2561640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f15c30379231d3b78adfc69d2e2f05a66727eba632b873bbcd0c5ae8b3722e. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZNWZ2561641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035446e1cc41127bca15a32b32ed7d355afa7ef5d4ee2b7d73d24dcc3cfca373. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNWZ2561642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa85923511105556c59d01f775eff847fb5df1f806d451888c762285323c882e. 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/QZK6J2050452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369c51ea0782528d0e8b69fd0c08dac004a3cab4c9f2cc0b278efb598cbac9cc. 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/QZNWT2064926.