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 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 0x173ec0b07be2f6ced71c23f4aea067a5c87ca32b8fa5a6978e6cfe6de70aa3bd. 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/bfbe3282-8385-40a2-a4f3-96bee87d655d.json and https://artists.proofprofile.net/proofs/artist/bfbe3282-8385-40a2-a4f3-96bee87d655d.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 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 0x88ab61d33380bf663ccca220da4d1f8d3cbda12a61f1840f041c05b58c436dcf. 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/USDXS2203528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d524abf725c81924b478620aca8b0dfc8392a9b260029f832e12f38eab4192. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZ9QQ2200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73dd0e473b7c3ffb33294639f3f2b3272b536e52b58ab9cf77e7a27ee0a2b0b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZ9QQ2300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939f05f0f99a7630bfc9f3150cd87d263fb786536b9219b627fe50e17f75777e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZ9QQ2300945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9be6e8ade1800117cdd3a8eb7b9ec4c2e91f87df39f7cc26060d3c9865c81f3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZ9QQ2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca09fa5ed73d5d594148350edc3beb36c6dd313eb1aa34fa268907cae2ef95ec. 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/QZ9QQ2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c779e958ab41e92e4051ba4902d78faefb7080a79345ad87af3ab4825441e5e. 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/QZ9QQ2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9be6e8ade1800117cdd3a8eb7b9ec4c2e91f87df39f7cc26060d3c9865c81f3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:55Z), 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/QZ9QQ2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1265e2bcd13c039df485d5fcb2c0f08cebb65cb0614e43988638bdb3f955ec4. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZ9QQ2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9570e9a467e833851e9718d279ac192f63089766d224e7bf027008e55fd12cb2. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZ9QQ2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14150ab3a73ccb5fe4b25b4b2bca566f7aaf0863c1dbaa9af4f1345e7d58f9a5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ9QQ2400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6dcad8fb30584b834977ca7558c0ea3f03b285b204824a39ffac4263b73723. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ9QQ2400304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61594c988e8f609840abb8a9c22a45d011fdb5d1d3dd0684696676993eaa3d61. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZ9QQ2400341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe341cbb1dfe7f27d48fe7a7ce39fbfa72b35d7cb931ce714e7c951f7a6f4cbfa. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:31:56Z), 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/QZ9QQ2400415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3217ac316c45d7473159f4fd7fe9e3ca166a5d04cb082bbaf962322b7280b048. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ9QQ2400628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d09b1f3877d064880c7cab04c1356ce4559551abe6cf3c1b2f58a939f9230fd. 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/QZ9QQ2500121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6941c70166d02e7e47c7cdfb38a0cd87f2a2eb8f08a59567cabf40842e1add43. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:54:18Z), 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/QZ9QQ2500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510fc068ea2dc249e48b2ecf1a9df49166e9f65e32717fbca4ab60c65ad77a5b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZ9QQ2500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa754e3ee2f5c99f76d7c1f6fe4f9c31f870680ce5511ef80e87dfd424a576a19. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZ9QQ2500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ce0542017fed1556338c290fac84fa97df2eab2ab706933f8b40dcdcd75af1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZ9QQ2500411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d81daf3b6ebaffaf21ef38c5817b2da7e7a6e0569af38941c28ec9ccbc57f16. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDXS2203496.