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 0x68c5ed92ec7535a3385400ca37b6500acec17fb541cc3f5c8198c331b87bf9e9. 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/f263a44c-4999-4d41-b32f-83278b432ac1.json and https://artists.proofprofile.net/proofs/artist/f263a44c-4999-4d41-b32f-83278b432ac1.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 0x5f45d4f7c925ba6a1a97a3e8aae8d7e38d0b9ff5709026d1fa67c1d1a6b1107b. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZFZ42089494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10fce107c5612a4c4971fd013cf60aa911f0b2df54a9bed44dc43e7965c1d15. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZFZ42089496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e1d916cf75ae670c84fa260ae05bd0d2522d5bd12ac481260ebd0810f9a436. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZFZ52064706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51152515d7e675b1adefea236335e8c8b777233a57871d8ebc58357448ec1b7c. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZFZ52064707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3218ea73e083964850403affdd0724eac98ea2b9434129d581bf44ad56e87b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFZ52091449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a07521e868d3ed0684d48d187fac1e32544ff7ae41067fc8348df59e7c5408b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ62003727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a23b3bad9ea8f73e36d6d3f0b9ca89325032c9a64a1bf404a04eb0ba9a2d30. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ62002451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b521dfe6400782fbaecc44d170391fb4ddca4ac0707ee8ef356ad9a9abf45e3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ72006580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64ec957f4ec4da5bd4b9aac19cda8ddec275e735af989dcf230fe86f9ecf778. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ52063878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbe04083f29af1f470f2d3e0825fcb4b4e3c60a81dcfc92818ceca86c8c980b. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZFZ72007845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fd2f498928e8f71e2a2c50a26aa1d6860b811af032ad45278c822a8ad1eac3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZFZ72009019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6baf95a12c9b18e4d4dc69ae6828e90c1bf0abc187bb64675c522b6b1db83ff. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDA42032025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1ec72d21663829be53b76c12dba39e5e63d4d331fb455083d65d6769ae1e94. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:05Z), 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/QZDA52009088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97521ff5dcb1bc16f109628db4a6f67cce71d3f8ac48f5948e0a7e5e71390683. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZDA42033496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf141303d40e8d59e46773a93ffa079915ecdd4e9bc4bd694861bae0efd30d9f. 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/QZDA52072980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471940837b7aa3f9fe34c101cb1b4fcd0adae22d62edd6cf14a231e6e730020f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZDA62093692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedb122dc798d42371ac6802ba925b488fa36fabeef768658a13e75bf470dc6b. 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/QZDA52067756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bf37304adde0eb3252c4b5752e66ba2494567fec0b7d45d4bc8c819c0b1e24. 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/QZDA72062705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f1825237117c16925e3da225989d2646dab674bbf1b9ba955a70e8bb7b73bf. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:48:43Z), 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/QZDA72071331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5ea07bb0b8114e22dccd1b41fbb885a9f0b02e25f4b1d7c14101a73d5f14aa. 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/QZDA62074425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1b967c6332b45c6643c1577f439b0c993b7921e2a4978e028ced6355a39a92. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES52038269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1972a8461d9095e40abe5561efa103cf28ac4fd07169eca5f17c8a645531d6. 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/QZES52083019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5765fb131c4583f9ce7feea916b9036d3e2c824e8c34d08c92e90ed288c5cf7a. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZK6Q2045771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6898aa63128cf65ad7b330cd6ce258e559cad761f057484d4470d398c7e21050. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:25Z), 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/QZHNA2057900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eeb33b462ee4b733516d8b00c86d61800f11b4a707d5067905d80418f0c00cc. 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/QZK6J2023650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ac308348e62db75739d19c6247664123129036f381853f1a790a7699e4deaf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6G2039739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fda00da8f138918f7b0d3abf812644e99616ef89c3a15297ae2f1f942d4c090. 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/QZNWQ2067260.