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 0x958466a2fd453dd166696758ed857a1bf9339b24b139ce042b9f7d1686b2b358. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b44bbce2-3ae7-464a-ad6b-2474959b72ea.json and https://artists.proofprofile.net/proofs/artist/b44bbce2-3ae7-464a-ad6b-2474959b72ea.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 0xa272275b7c868b489f3874ce8ff4137a198baae6ab6a56c7f2ba511150864c92. 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/QZK6M1914175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1551277a37082abe2703e4971e64f92eada2f4ee3493280713f67cdf50bb8ccf. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:56:51Z), 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/QZK6M1914176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b5a04f6f9b76d34c059a989862bbc42e6a1585e8e2c3751175eadff307120d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6M1914181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5071406422597282691e8b1a5b133268963a849a640737ae3319d2a5ec181d2e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZES52093532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132e744354f45a05ee4d28ab71e4b1ed136a6192bca7f287f5d5ac33ef8aecfe. 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/QZHN42045548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5788ec067dad61437c3bc8bf93a335a4d7db760a327d81562b100c61c749220a. 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/QZK6F2091999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9795c28747e2680bcf87bd37da5d47be8fc84a677b679c01d8e7a39fe8fe36b7. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZPLR2013347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe248a4f2f8a20bfa71dc22eb22eefb6541ea1f3c982f6d45eebf123477ffd93d. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZPLR2013358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09982c497450a742cd484c127a1be762717b781471175b65e49d6d90099a3286. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZPLR2013359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1ca1ac27a4b4dcceae3121d6d68d2d39dba61f04540291b51316e8b1945a11. 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/QZK6Q2113358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb560495f19f518164177e6543a8fd42a0c5f8782e231e1c4461c5d74b2793cd6. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:03:58Z), 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/QZMEQ2127362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84f2b51d79abfbe852e5cc77563dac82753742a3b1d414bbbfe5dcbf5f558d5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWR2309485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268cb13131f9bb1b99cc16afd0cf54cb88be35cb7cac209c5d58ad898133d5e1. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TRBZE2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb21dd1f02f5f30016491ef6544725d8763dc4809a72dee4d449410d82059a12. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TRBZE2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c63c418d8a4ea8c6373cd04fb9c6bb22ffbf99eeda5cde62a6650c911242cbf. 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/QZWFU2412148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa652fe685c6d0f7f829d1f6c17bbeba1ba2d7eebf360f87825fc300c24a6e7. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZWFV2418463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0407a5a210faf2804821688fdedd0fb598bd3c1cb6d1b7f2fc3760b305f210aa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFV2418464.