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 0x9e183308779e5770e4f776d1d90521625b9c97638ab727f54701ff39a55905a5. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d806d31-c0c0-4e5a-b097-f26ada6e0d2a.json and https://artists.proofprofile.net/proofs/artist/9d806d31-c0c0-4e5a-b097-f26ada6e0d2a.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 0xceb5c374fdbdbdca220a8872994358268b8d29532c41e5a01d63bb06cdb679dc. 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/GBKQU1589789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0ccf7a14793e48168b68ceadcafdc1926f57df4a19b2f8ee99558aa5a23dff. 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/DKZVA1460532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f9115e27dadc7a3a1d71dff7f8469b88e23daabc98037f16e6315ec3187cc7. 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/DKZVA1460535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca8370e97810aa61a37778ddb749ba6f99d024f02885c72fe6410560b7add96. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKZVA1460536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5608e01f1e000b75c5215c2b2f511fd5f3dbae254ba940017cf1bed4f25c3f. 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/DKZVA1460541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e8083cb31209b0775622cb7cef55ba6ac57fe2291e7d6dfb7872c4a2f9e611. 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/DKZVA1460542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abfc0b773c92c1d5921f485b1374f8f04c611bd561d4de537bb7fbc419aa2c9. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DKZVA1460544.
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 0x120f65a093c6407b5acb80a7bd533d6d5a158b1f1fa8f3a1860ae988d0e169ff. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DELK12400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80238e63efc8e92a48d6bde19e46b49f62e6cd7d4aa9349f46c648146a06020a. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/DEPI82114626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b85db9b755d3aa537c3d123bb9a5e6891a44d0e80a25d3f618540a4e59b15c. 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/BEY921407533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2fb94e4e4c46cc2b783c76ff405c06b998f7c67c197d697673498f05cd933f. 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/DKZVA1460466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5419d7228bfe12007ace11588225e866a7b77be61ef390486a8680c3fd86bb96. 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/DKZVA1360284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08a21e7a6ce4e83c57f085708cef81fe9b4a719faba4a97f9c8da3b65ca7e11. 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/DKZVA1360285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3e8d0fcec2e8bf5d4ba1552186dca0da3bc9aa1aa64c0e59161969c1a6e677. 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/DKZVA1360286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aedf750964d9346338245fe76f400d94aa70308d868de4f6b88b64c01fd96f1. 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/DKZVA1360287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce8685a7448b99eae2775ec3958571e3386272b4ae57b560db81bb20a734869. 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/DKZVA1360289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc896e5a4bfe8a506a4db8de4a8be7d075755f136f349aa4612c147705bcfcfc4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DKZVA1360290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894001c54c9f63fd25d8c30ae891473ce8f3b7d97d895d0af82ce03e65337d43. 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/DKZVA1360295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c27843c639a8fb636508881a639b313064dc7c1e2e3ab3556831f346a794ae7. 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/DKZVA1360299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ae5ff60c7fba41c7672970e84d2671d81f8f5e778082088919d37521cca045. 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/GBBYB1401714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de204a08c19fab519a206dd0ea4e53c8f31d2d104d3272f7902d65886cb6802. 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/GBBYB1401721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502837f772f97dd188cd0abc1f8121f8ea228ed684448dd3fd312fad2f781797. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBBYB1401730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455de3b8898bdd7ff85db98f9d9e183d3fba25d65f27a28d7f6e669a635fa603. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DELK12400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918c34960adc2fd96d924469678241895b77994977d354d82cecc31fa9e22fa1. 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/JPP741504802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18819abe7ac185b8da365ae900d69b78466d7b620cf31095c05827d3ad174f00. 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/UKU932333848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd392ead215cf9aa4450406faf98adcff0ea10e4408901c3502033c433161b42a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBBYB1502247.