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 0x9c3dcc4e797c23910bc04f8433354aff0973c7c2311c6fc297f23f00b19869de. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8c55373-5f5f-4cba-9c2b-e1d625c1a5d4.json and https://artists.proofprofile.net/proofs/artist/a8c55373-5f5f-4cba-9c2b-e1d625c1a5d4.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 0xb6fb09e209bfd5d885b18d2d288526533ec0ae2ac4b1907f752e5839672d5611. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ5AB1825298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fd7e6575cf33dfe9a444f5b63158fd793bb35880e56232c3d1feac3d34588d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZ5AB1947570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3587819929f7f0489a02e3ce3b499b4a94203fa368831a957fba9133a0f0677. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZ5AB2016227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee5228178ad845c1c09496fa66b73d8498609d1106e6ab3ca263a88203d5c34. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZ5AB2016235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8f32cb0af82c96c89f089b64db71472eba977d5a218d6a2b7bfa87d20faaba. 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/US7VG1859389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43fbdb9a06275e1060fbac05d6523c489a5228429bb5f3520c5328c93868cbe. 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/QZGLS1972131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68f6172e474e2c8cb3ef55fb27b45ba6957db581ccd89cc63d0864704e2db7d. 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/QZGLS1972138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02aa8e8d4b7fd38fdfcadeff45ea5eb01d3fc02286cf65473596f93aafd9e100. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:26Z), 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/US7VG2367620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1496a0d3f676fee4c776c40899ccb90cf3f004e805c19706d38d79a6fd7644bb. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T19:07:41Z), 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/QZMZ92332213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89703d0a15b0d0f037e272bcc29329178693ee23930562225d3b0a2140c96cb7. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/BCIHC2400001.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ee9d848434c97f60a784ee656e38f5bf27309215298a1e863cd24cf06b32b0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BCIHC2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803cc62030cb0f354a4275b0b4ee58e797c554f43aa95e668a2e1f9f0d117267. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:05:27Z), 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/BCIHC2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e47655327affdd90e5156cdb25115060a2fbd6fe4173dc2db1e93bae60c610c. 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/BCIHC2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8636900eb8403b50dae5e72c664e19ade44900a57b41c39de04ba428542459f1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:05:43Z), 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/BCIHC2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeda477b1738b606fc812e3cf1eb9a23d322e38d037873994efa6490384a5c5f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/BCIHC2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7c13611f15a4ce1d918bbd084f2c436a9fd7111af915d666023571adeb61c3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BCIHC2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65697390bb9828820fad90c01739ab042741be7a4bb7d1b12734221c6dd9e68. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BCIHC2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5386ee3478d05a58fa92667793e4653e5b703360e46a0f21180926eb606efdd. 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/BCIHC2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fdaba1f10bc3053f76e9e88f37e2a87c37f3368ae27d73e8dc4136dee83d2b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BCIHC2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8759dba3b74d22be4e297a89a6e969622f473cf540f2ac07a167db223966a2b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:54:53Z), 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/BCIHC2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5852bf793b2c8e847000c1dfb38dd36a1af1f36c47df0faebc48dafe449572bb. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/BCIHC2400019.