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 0x42e0ff7cfb63813286ce073f6a08ed32db1e9653af9f85f6db044ded536dee6d. 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/acd3a4d3-9479-4281-a301-5a20a725a3d3.json and https://artists.proofprofile.net/proofs/artist/acd3a4d3-9479-4281-a301-5a20a725a3d3.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 0x588407245b37cbccdf391b2d432d0270ddae5b49b5be1c8f93442740c2fa4529. 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/QZHN82323050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec15b3972d3c662dd67f5231e6d2a48e140d9b76bd491ea30492b15b03581231. 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/QZK6M2363979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4adf98d7c8d9a4ee4781f67e54d42c884d52b9030ed083757c153cd7afabbc. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:18:26Z), 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/QZK6F2353297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3290564b20a3181240bdca940f1cdd55e804370a8296ffa275f7b5f87e375b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:42:38Z), 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/QZTAT2390549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faae293e843b734a7feaa69aa2e128fdbf498f6ddd776ecd45483889538c4d3. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:05:01Z), 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/QZTB72323584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df9451b20a6ea7973bb8ce41135dc7f16947e4be93c57d20189cb480f10ace4. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:39:39Z), 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/QZWFE2357809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066bb55e7db53a153f70e94ae0d456ce17353db550e41fd4cf31065ef6f5ea14. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZWFL2384629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bb4bfad389575c58d74aa1c2dcafcdfba88aab6acc8bb607c3884c2bf9d582. 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/QZWFQ2379166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73bbbb449ba24b3a9ae56678d144358efa4bca78f3c767922610b16ab4a883a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN52483850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd94c6eaaf4bedac0cc0ae9d807cbda8949d3be86947fdb01229bfb69ef8af0. 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/QZK6N2466269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2294df34c312e9e3eedaf55cacbf3f8f95bd0fae0e195486193b09300e52e039. 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/QZMEP2425400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4282780359e90fff880f256179048873c175f245e528f0d05987b2bae3b17010. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWS2472789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cde99c45e2c76d1c69173470e46afa6e32e25eaf21b40c6433ddf574a8b9fe. 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/QZNWU2483375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cce0758d54b82983a5e3291a7ad5a2bd799a7c8731d55e37eaec770fb9aedc. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/QZTAZ2421521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefa63a558cdab39116e7b1e70c51f15f307efb153ae50bf3bfd6ee5a38e9300. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:24Z), 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/QZTAZ2421522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c7d923251dc9f0b9af875d420abcf17e113f3772d05baa5bb333b9e65fd923. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:13:18Z), 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/QZTAZ2421523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371b18070b443041e37dcd38d3d76cdc0347e4ea328ffb6523d07c2fe4ad4d13. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZTAZ2421524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b7069072afcbabd6433f2c224774116f64190f483cb4b8ce3ea11327ee932d. 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/QZTAZ2421525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12765eb9673a11636abb1cc0d8f617d345491f0e1b2b502249243ec072eb1140. 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/QZTAZ2421527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcecb56280153c3f94d758caf71a2efa37a5a1cc0d2fa8791d27831e8a8a2a5. 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/QZZ7Q2451175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d66da14fc8a73a7d1e2d660e57340a785e83460da7afc48409e2fcd10b44299. 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/QZDA62557480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e512722abb254bb5735de465d2bd3942656551538ca69823d49fc7e98f7573. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA62557484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85dec7a008813a6656d594772cff843b8eea1446c58d4ce6fbe43e7b200b77f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX852502160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb711693d99c88e45ff7299bb78293a5d0c53071c76ffc5c163c022c0f6c2977. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN42499015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3d2cbb13b873294083aec7753587307ecf32472eb3ae90dde82bc78aea9fc9. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZNWQ2409641.