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 0xcb30ddd07858c17180de0240f55c3382d7e08256c20f9f897204628a4890e373. 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/7595d533-6151-458c-acb5-97c4915e1d7b.json and https://artists.proofprofile.net/proofs/artist/7595d533-6151-458c-acb5-97c4915e1d7b.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 0x16007e780ab937310a33f8bd7c6900e4dde7db7f4df200bf0fb53b528fa55441. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QM2PV1805295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd36cc97fd11084872c22ab6bfe53aaae5122d118e2b34d9295d9f355cd0de66. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES71876943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363ef0529246f05f5216152aab0e6920243d738edc5330c1b0b2320e56557837. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZHNB2060878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659b746bfe4e88aa767ef6638c6ff84d7f8fa29ee57d5562ea392924bbf081b7. 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/QZES92147647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce51c38c130f6dce67e8618c8b4d7a068ba9cbf73fdbaedcc01116d9184c405. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6F2139324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9075d1fe0f1f572b784c9b1c4358f90b40f1e477a75f4eebf09d5b1e6603a9ae. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:20:31Z), 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/QZNWU2106804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ae6a2c1092faaca3cd9a3d350c157db98fc6b75e20118ebcc5557f96a21aeb. 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/QZFZ22202517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc539ef38f5dead6c08b5f5d440b17cafe081f929c7d275d263b22c2736b3c578. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:53:33Z), 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/QZHN52216673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c88881c5ce84376494442e0cf482aaf78f054e1d26f7321d8602b67fae6f125. 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/CA5KR2294229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb913c2d86ec3412636166ec93aaa1f88d186ad41a8161231637aa3e796c54840. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTAU2237053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbcac224e300a6dd57bb0d95b2fb1a01ef5fb68fde4a84c3c1f55170e596fe1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:05Z), 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/QZES52386161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70618df679818bd270622a56e47326f4bc45adff59d7988284b86f5c7f22d3a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHN92352029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235c10391526dc9de152f5e5dd2b1046a5c3e8b9adc9cf6466feb1f717579f10. 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/QZNWS2345982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9749a6a3925303bbd66828741ae6dcbe4dab030b04c37ebfd9705edc719576e5. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:52:02Z), 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/QZES52428452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3a6772218ba2fa7fd46a588eb03654ec6afa2803af7e53e04a13eb683840a7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZPLR2415468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e344b476a1572f120cf0ff443e9c991a5b0bc0c57383f5cadd76a9463ca927. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZWFJ2455274.