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 0xfb09adc72b662cb712ee4051e18dbe498e77087ca5b94ff6d20c0a937dd15a1d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5d471c7-9bd7-4268-9361-1e5a1e62bf1a.json and https://artists.proofprofile.net/proofs/artist/a5d471c7-9bd7-4268-9361-1e5a1e62bf1a.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 0xcdc2567dfbb83ca6362d8b0c69cef58051282670a78233af59e9dfcfb56c2164. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZHN81940922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31560da594f73f4b9f2ba69b2af0f365a2e5c4d035eba24e3b68ef3c90656ee1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN81940925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa322a2f7250ed0395f96d048039f9d88633c3164b1efb329309cb199bf1772c0. 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/QZHN81940928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f948ea59e60100c013d991060d72579b9b16f15a1efb2ce9be13473e8bbf88a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:48:56Z), 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/QZES71870469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561b654508a6db5b3117aab1b26689eff83cf1b407802e3427497ba8257d7a9c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZES81863583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844601be6e60795da697686ce72e5fd64fd66f9c5f4653bf5905df1b04cc9d20. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZ4JJ1852675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe067b5a0da66229b8b1f70238fff1d3f73cbf948a846c007608be6d54bad6775. 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/QZ4JJ1902430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d7112712704b314c2476f29fa99efd616babb34b30226d3205b1f5e441a566. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:00:34Z), 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/QZ4JJ1932698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec1204404d8bd789d9aa77959cd45006284beee097c60da337cd6ae0f65f2bc. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZDA51917901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0919be2f395dcad02cbb4e1017b4271141f8be63965bdf894320ca73f3c66ba. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN71985022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9f1a59df45bded3180d903d40fd3b327f89fa1291473c6b6160851f1c6cd01. 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/QZHN81996164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7099068cf2ce09d20fa901bbefdec0d1693de52634c72312f7ecd513622633. 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/QZNWU2042384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de0b3dbd90b743e3aa46d0bb43dc1d612fb70670fea2e2ffca2e32f5d3f85b1. 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/QZFZ22138197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b300064ba86a5cf35b15c8bb2f1d8c7ca9a8b8e0bbf34d330da56c141135e65. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMEM2246891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddab07ca67cffeeff81d9953feae82780bec5407abd86475ee957d1157b4686b. 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/QZMEM2263145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4bc10c4c899568457ccbba297bbd99ed3e4ae6d9ae4055ca38f0f5462a5ac9. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:05:16Z), 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/QZMEN2221759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4959d733425e7c37557e7f050b088f7809676ca318af427df3c28be35f16d7ff. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZRP52288374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298860c7586e45fbe38834e41123d7afa1c11c74647065d89de96bfa764a8755. 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/QZFZ22393657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43303edc8eda7d7146761eed897b01132fd6b37ac08b4c8316a291fa69b88633. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:02:14Z), 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/QZFZ32309950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297d06f97e21afc68d6ff5394f1f352e0550d6aff10cee8a439b93fc2e063227. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZFZ42365779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d81e579c50fc10388a1e5e59e803169f4b73c66c63571d4258c1ec657484579. 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/QZFZ42382998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9528820f53faf2c6926c4ecea95a07aef7a5e3f969ec0b3a28b944cc5ce479. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZFZ62309526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847b7177a7999727202aa5fb39e11eae3757f6655b956a9d2799cd6d89d07dd2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ72345983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b6b25d7e23b1576a7d38653ae8e8779e3e521b1bb987028fa361c917469c8a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA62345333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb54e763048ac90ffe53458bf38b5354c1cbc098f484cf81daa83872c6e9c5f. 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/QZHN62397907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8912a83c2825d9f95a390dd445b7b4a3a4857d07661fb8b7505613c7a1c60d9b. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:44:44Z), 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/QZMEQ2355694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846c302573bf3c853f6091f27f7b1db51e794645c0293124e1f2050b33ecc75f. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:23:32Z), 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/QZNWT2333917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadf6bb79e927045a0352b874b99f57171a32188caeae9905c3c426e7f63d14a. 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/QZTBF2331287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc18b2ef4214086111ac65d0cd0ce5a19d9f4c98f367fc68241f0f644640fbf3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFN2488609.