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 0xad28c9b99628370b75c30ffbe8dd095ee62d08465c4f9092c9e1b2ba00e5e833. 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/5c6fbe9d-3f21-4f6d-838e-5861a3167835.json and https://artists.proofprofile.net/proofs/artist/5c6fbe9d-3f21-4f6d-838e-5861a3167835.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 0xf014f8f78eee0ae6c4bf684316cb04cdd8b47b89676fdc07206bc39c30af6a73. 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/DEW922001519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff0378fb3043638a7932fefa05a36a655bd91472fb0b792835fb5b43496dc87. 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/DEW922001521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efded75a5b47c62457afb53fd6942ea224fe0cd903dc1932a96dd0e05d892e3. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/DEW922001522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a38d6863085ecf98d1c48fc35468a9083ea08afdcaa2acdd704735734b4159. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/DEW922001524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299045ed190d4332411f04bad29c234c3ad20c97ff3d65921b74b831b2e8fa30. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/DEW922001525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfb6d3df919497a9d3455242fbcb8b1e0a3116c11e9a2d1f380b4e1d3ddf7b1. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEW921400768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6fb1659420ec6b3b223b6d5973205e0abf360442551be7bda7dac0d0beb9d1. 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/DEW921400769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd074acabe7fe4dac62db832b2ac7119ba8ecd676218c7b4bdaef9c18bc9e7969. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/DEW921400773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc252b9ad3ae936e2f813006c04c811d7d2a7a385b333f78f4a2ddd63b21685bb. 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/DEW921400775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4529bf0e8311a5f9ddc5161990ff055138d2fea1d8f6ee7a9c1e4e19fd8409fd. 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/DEW921400777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e9b26dfa7121ffe3e5fbd4a8124db77dddf66c4dd3032aea253a44732513f8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEW921400780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2278ee2333e5b121f71c73e316bc92f8cd81adb225c00310ee848a53cf44b7. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/DEW921400781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7534648755602f2a62066cf4e414abac348b1b25fb73631eea11ea886a95ae87. 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/DELJ81743441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b6f1a185cebf826db31c2ef5bdbfbec7bfcac93de444cc89fb6e7bf7903bef. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DELJ81743442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1978201184fd427c545b3d9ed87ee8c3ab1d820fec09b2ee2a50959d8a4df6ee. 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/DELJ81748024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b87010af2dc64e8cfe7054b1a4022aad740f80b99069ba1cb609da3f4991ef. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DELJ81823655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5edac89d6f23716c11ac863289da5b7fc096b34ae067f56f6224befa08ae67. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/DELJ81932942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8158f84e7b605527418a8701f534e9feba625a850e2b6f35f5fe1480f1e980c. 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/DELJ81937225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb90aa2410a0a1bcd4d92b2f27a155b3141a63bc83b28c97aa353fb85c8cd770. 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/DELJ81923008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf151131e663750466c2f66a974b7cf810ec99a882940e6f986a524c61dc1fcb0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DELJ81937228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952568626893d87cfa9562b80ce883d5e5c5a01a15520899421e0ac8c3290c51. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DELJ81937230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61903e289ba896ec1c5d80fdb9d762fd4d15d2303249846dcb3fd6942dbb4c5. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DEZC62174932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda233db5d08ab452af6882774681a47851abb8e25eb139a5d4f101f3d714b2d6. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DEZC62197635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ad265d579788cf7228a9b2963c49d3853a837f2c5a71a1a9131710ccb7c26a. 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/DEZC62204088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e4c14843d96705d80371851e4fdeed0eedfc9dab0f63ca0db61cb747f7a231. 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/DEZC62334368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2e9630716571daf848bebf9957a3c2148ff30e4787918faa8fc3ece63c892a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEZC62344132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e4c14843d96705d80371851e4fdeed0eedfc9dab0f63ca0db61cb747f7a231. 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/DEZC62334368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf687ee4f3d7bdb958ce9849c047b841f3e21316d6aec5a25c8deeb20a06cb7b7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZC62361211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2e9630716571daf848bebf9957a3c2148ff30e4787918faa8fc3ece63c892a. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DEZC62344132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae6378d06ac1971b8ad959c4192168ca34c752e03be6f20bba26536f9e7e124. 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/DEZC62361214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5383fa9addd73f8219f94b48dbe918a91d1440fc4b96ceed817252b92cb0ad6e. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/DEZC62361219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e86dfa2875df9068f4af2472e63272b2a0eecb3a184ca41a9f73333f0720d16. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/DEZC62433149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbcbfc47697c593e685123d610bb3325dbbd740da948fc80f0358d8ed608afb. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/DEZC62411167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbcbfc47697c593e685123d610bb3325dbbd740da948fc80f0358d8ed608afb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEZC62411167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7265fc82025d36ee2af0c7d515df5bc311ad790f6b4121827a95a3f859d908. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEZC62443079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65626b1584fdafc61f3c4caa91ef850d17004f53392c312e5427caa496ff3d9f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEZC62450380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e86dfa2875df9068f4af2472e63272b2a0eecb3a184ca41a9f73333f0720d16. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEZC62433149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbdd341e2b5e1eae2c57a56990e1073dd2410ca73fd32da3c0c434d594c6657. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DESA21300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df9ccb2acf6572e071c3e1b955eaf57ad4e511260d90d53a5cca5824b07c078. 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/ATI211911711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc09a663e883457d6b229ea15a286599dd1c09df416452e49af7b0c8701efe04. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEW921400578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdd7e53983a3a237f2d93b525da8f953f0a45926991dc1e26a329c4c07f5b12. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/TCAEK1937118.