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 0xca31c878f20bc0f846a383ced7e22ec5c31a0522e369a25be5b8fcd76e5eddbb. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d402848-9d8a-40dc-b677-db1144fa9ce2.json and https://artists.proofprofile.net/proofs/artist/1d402848-9d8a-40dc-b677-db1144fa9ce2.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 0x6b32e9af610ae52bf8a368902c58e90faf5bc15196eecae4f68884938005c627. 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/QZNJZ2341063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db97db36009f0b232cfb39fb3d0d80329c82409057e04d379826616dea5e9ff. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZNJZ2341064.
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 0x7b854072f46b7a3580bf4b202461d81813669f09c7b25dfab56a198035625a4c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWV32475601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb21d48d02de0d9fe3405ba43c9004b87c6bee7d177be49d73415a615ca6dcc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ5FN2496317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44c22501426cfa3d0763a6f21b298b78c8fe4b5ebb483d38cf84c5ddb8e89cc. 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/QZ5FN2496812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9af9650966ac796ac3541f01f8cf704a47c0a6c1f2df6289f38a2829c76b4d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZ5FN2496269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a34077bc27d65882a2fda8c3351111a3710324d5da35e96a541bbbbf2eeec1f. 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/QZ5FN2496382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e83494ad9a8777cd6bc27a6f7ad19edc2c4e4ff686c6ca14103f7c65de00df9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZ5FN2496637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e7f27db383dacf28c7e809e351372fceab1d530781606cd590b4fa5d4615a4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZ5FN2498050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952f1fd5cd2938aa8895ecde10f0d6aa1c034ae9f9c57265aaf14c942b87fa63. 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/GBWUL2439677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d304eaa8d7608fb9dc49f03063835d257f827a5323d83b2280bf12a6338f26. 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/QZTV32326065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977f1d26d2e503fa7085d58c0d6f0488c64c059b3b4255b3c5ceb95d9f1b3969. 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/QZWDE2495784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21740867d4e96e32edf8a8b4713314baa0c36113dc480c5ec6ae08e9f6e97a5. 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/QZWDE2495787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96079d988970e77fd73aefe2617b72c248ad9d51bfe16d2ac4b0f58df52bded2. 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/QZWDE2495799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3be35c420edc1f9566d3c4b5f0c1a90b5b3a7247eecedd19c54c9fca84f41c. 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/QZWDE2495800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec402d998c60192e4f80e96801faf4277fdef8a20cdeeb98f20daf9679722a7. 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/QZWV32416471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a22342f834b5befa124aac3369f86c1e2abfac468a4c228b7de4a9ad1cd758. 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/QZWV32414799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86126da0dba0d53cc9e54ad70baa05928e8ab42d45d9c0eaec371970d877a088. 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/QZWV32414800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9942eaf82f382755a1f4d959f3d9780d83dc83823a93e9be85b201fd96c5a3ab. 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/QZWV32414801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc40818af0204ca1aeb8b74c20e25813c13561c616a456a7da4b0b415c5e3c8. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZWV32414809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfeb059c7c785c022bb0d0209414ab57beaeddf4568e4ec0277315659099a93d. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZWV32414811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995aa91089f9ec0a8eeb005a95ed9444a8904c1ff3f3ba34bf0db84edf1097d2. 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/QZTRX2446338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b63070d6d4e7d952f1c88da97ecb0aee25889871b7a78c245b12b0f93b100ef. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZTRX2490144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53aab3beed7d878959e830680f1f557b2fb25585a6e80a5a1696662045a0e1f9. 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/QZWV32376324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e0d10491b92676f75d11221598d08ed3e59a355010a2a3aacf52dfbf3cebee. 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/QZWV32376326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2231d2bd32a168a4b2cf6bb9248ba114190039ee1d48ecbe4fc49ef49a4db07a. 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/QZWV32376328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037b656046aaa633c88fbf883bed1ada7bcc7d13300e0e1a7a50a95dbac8a38d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZWV32378289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf0f93edd9fb8314c4a1e69c2a3e2cc21e6bc476ae3d6c5289dfefb036a841b. 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/QZTVM2323588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1aa42315f3f53200d1b72264879dc05d5bbbabd719a389682bcf3a65243e434. 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/QZTVM2323593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b65af5898d7b10a92c017bc6d27821b1ef0a81a3a88a215f85615dbb43f8d8. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZTVM2323587.