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 0x396c5572becd7f4e5c0adfca02a65ec0340f3f2841cdbed73d81b7d2303d5a6b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cf6ecc9-da0b-492b-bcde-1e78ba2d0ba3.json and https://artists.proofprofile.net/proofs/artist/6cf6ecc9-da0b-492b-bcde-1e78ba2d0ba3.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 0x57e9e0deee984fda727a0d86f21a9f7aae1e00ddc3d111ea6da831b02114ac0c. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:10:12Z), 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/TCAEL1938998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3a326e6cbbec4413be20c7188f919dbcd47533d8020b585f9503868335e743. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/TCAEL1939001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422368d77e1e26e5b2c85545fe1b65ae1eac02289585816fb3ad6f75524af1b1. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/TCAEL1939007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e128c65577170694238a37e704e92c402c99202a51513db939743bd4fda4e5a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGF2297577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8997ddd5a0a2fc5c1c66cd332daa864d04d71befc8cdf6779ddc072a870e3764. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGF2297586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa939f313671dedda131ddacce02d571d5a0357905c58adf3f12ddeeddb6b1f. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/TCAGF2297592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8e34e3c8c8368f12d87cdb0cbf66a6e3ad1b39854508b7a1bf48d1cf6268d5. 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/TCAGF2297641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28cfde581170385d193d819c69c46e99b3b9989ed118f26c69fa18dfce03510. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAGF2297655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbe35663c5471d4de9e195491628bcc628d4d3c5e8a63c662f7bd90b77802bc. 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/TCAGF2297663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46af82ab31579ef011e2575ff41997fcf5efe6becfce5a17ceab7ea41fd570da. 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/TCAGF2297680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a00ac431072e488556883fd11e3f4cdb127211f12b15a458fcbaf8e35a2177. 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/TCAGF2297698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58fcba6fd8ac1f38ddf32326c433642f3f20da17b2a06575f60545c793779d9. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/TCAGF2297715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb023099cd404cea0dbe9aa0e552528f9e7625d95c71738f89c36a910eeaa3d32. 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/TCAGF2297725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839944a547a4289d135b6da4b99237b91c332708c51b9691204f5cfec02bba39. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCAGF2297567.
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 0x59c15ab41c96289695c367eff946a1d8f9d3971abfcd065cd48d531c4aff711e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCAGF2297659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079fb189b7710700f878cbf985a308c4b9096bddee331f0093ff7b211ae7dfa5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE62M2396941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ec534f2e8230f709ea5c302de04165dfe208c078fc3126fd61e12d03ee8a0f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFW2499588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14731f76debaa9237da27e0592717842ba370f10f342af6951be7978a8fb1180. 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/QZWFJ2314554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9eed128d068882775cbd227c4b59e3ae54f19684ecde6155ae4e823c29d089a. 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/QZPLR2369063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563cfba7a92bb4e8377a595425e50d7caa933eb49dea1cf385a6c1b6464e71a0. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZK6K2491746.