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 0x4172dc1d9f7f151ebb28277f140a3b8e22d30afbf432538f6ec628937ece6871. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/358c5ad6-33b5-44e3-92e2-d5fcfe856d0f.json and https://artists.proofprofile.net/proofs/artist/358c5ad6-33b5-44e3-92e2-d5fcfe856d0f.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 0x7c4965d1cc79022361191df7d14113a60b6a7162b6b65b99e8f513b248f07b3d. 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/QZHN52084927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4410a381af51f8a38f23d34be1eab65e3a55a157e1b3fbc8794cf67cff0b0db. 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/QZHN52084928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd72b2dfdc3b2647049c0591e26c875f82b728b032e38e7e80cb6ecd1b41d5c9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN52084929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e4ced9b294400d88fa489007b582fae9a18d9b86eb0045aa7b6bba06776871. 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/QZHN52084930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dc42835b38f753bb1cf3c4ac972ff78acd30c10191b96c081a83406cfb476e. 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/QZHN52084932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260c82c84849ba88ea39316b1944a044163fbf1b3217b1dfa2e9b6e66032606a. 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/QZHN52084933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149353fd20412f1c64247d80557808793daa82fa8c19fe977bf5e7586bc7b5af. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN52084936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbf956122861da88ea804ad27d1a3e4583c9d37d4019cb83b1fe51fdbf8e68d. 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/QZHN52084924.
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 0xfa5bb222f3a231689b2dae464edcdb12f3b01dcad736167b85b421c17ad2830c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZHN52084925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b026178a5e47f2707772f116dfa63c05621c9d59fc0fb0e649586be2aa2f6a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZHN52084926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83eed2a2949d6c01082150f742ee4e83d354dc7fe899e1fd13376a02b321d27. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHN52084931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8414def8709027c59190716010120be8e4969ce30b9994913d45978da17b11c8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZHN52084934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5313418e2e6cc31801a6a69ef036e9642f8358430f997a561f448a41dc53b9. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZHN52084935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0f318898dfa4f7e0611b1f68a536dd21901cfc2ef5451e6eeaeec93f54bc3b. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHN52084937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d2d9705acec7cdd1cc00f5f5b367e9625f87d85f7f6529aa8877b74ef52bf7. 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/QZHN52084911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe983f52cb0399fe9af3195843ab2336a984b38f610f9aa8ba312d28d143ddc78. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHN52084912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0864ef63245b1a263bc50e3ec5339e0a1fc0327cb41e86e13954d2359c414ef. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHN52084913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cd70ed93679184da0a508bf5e17968c534d1cfa6282acd1c4d97fb3e299cb2. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZHN52084914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4869c753d21349ad7d92fb257e75a40a37ddd7346c8ea710663147ab4d7a394. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZHN52084915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60fae143c4deabee541bcb9509b9c7301c010f31f0f465dbc46910a8b10e314. 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/QZHN52084916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0646bcc386cf0f72e77dd137f4fe6d6fe02470099f97cf52c928e8b6514aac00. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:10:37Z), 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/QZHN52084917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7e1418c14e1e7b3e1451d0cb4b2fc2b771cb1929d456260c627a808a5229e9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN52084918.