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 0x1b161ad024e370fdf0848cfe30c04b4cbfdec69f60d32ea22188b7798d093cd2. 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/265557e6-3142-49a3-ab7d-2bdf80fa1ea6.json and https://artists.proofprofile.net/proofs/artist/265557e6-3142-49a3-ab7d-2bdf80fa1ea6.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 0x6877d9804bb193309527f277fbb3c5e3b79bc0d3e88afb105376140f88bddfbd. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:22:44Z), 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/TCAIJ2414960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf536f65f1315656bd4468ea484a69efaee5981032328ba6ca13a6101005ff6df. 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/QZHN92117892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d2d85c0660e4373f94c4ac9f098e41c4cfbbd2d5815b5fbf6b55aa514662c3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:00:44Z), 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/TCAIE2480216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635a2b20895c075fb698d2464a1202cc232de99084e983988acac162ded2aa11. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/QZTBA2484153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ca72e567e3e05b29b940a14155f063e5b83884c1fef86c7bd4f5112ba56a70. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAX2477914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cab3ebe314fd9eb64e8eb0499c9b4f791ae555a29c51378b0fb6c798e7b5966. 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/QZTB22436977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0733acdc194f7f5deb5d8c9e3a38f09a3335da8e64a6675c6d389714242a8fe4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTB22436978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90447d9d671ddfae090e3976b74cdaa0a6a4029f29bab1c572d27c2b2a7f666b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB22436980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cab3ebe314fd9eb64e8eb0499c9b4f791ae555a29c51378b0fb6c798e7b5966. 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/QZTB22436977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0733acdc194f7f5deb5d8c9e3a38f09a3335da8e64a6675c6d389714242a8fe4. 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/QZTB22436978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bf62763c8321d0aaea73cf9f271484bf1e0869047252728f4d19f6a76c48df. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZES62526297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ca72e567e3e05b29b940a14155f063e5b83884c1fef86c7bd4f5112ba56a70. 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/QZTAX2477914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1357f52c7c644068ade8a4d8998420469c1219f401011a3e39b5bc8d8f1c27e7. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:25Z), 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/QZMEQ2524989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb394d4555fb81271572298b09f39eafe2c1cc3bcc833d751edb4a6bfa248d9c0. 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/QZK6L2128080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a6c76ba7fc32d00b9004dec174911aa208977d87d7403d3a88b0605a88a417. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZMEQ2524991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf221b27c348f68004b05511d2057b5b5922e26665fb96696747e61fab6813e1a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJQ2557206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea3730f935aa4311c4d197c73d678b555df79a98a51926e8b4f2037d250b7b4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT65Y2533520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7545d7d6fa36003849145691324ee6dbbdb237ab36e8e2421a13485d63e86bd. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZNJZ2590379.