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 0x09d6320ec10c16d4d8f322ed0385e8fb210cca59b2cba97f93b5c13afdc8964d. 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/ec81b1c7-3888-4a57-8d00-e4aedcf58f2f.json and https://artists.proofprofile.net/proofs/artist/ec81b1c7-3888-4a57-8d00-e4aedcf58f2f.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 0xc2b3f8c6292b54f59f194b7e8a6997acd7a3a61969910ad9d5118fc702887515. 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/FRS182074753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23ef118ee406f525336156581a3b16b86f054b85862a7b1b9c19b2c0d5abe20. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZKDK2103862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb54ca6cf44f80ea19e9013027bdb7e2d9d4c7e287a2e97bc5cbca2950ca618. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZKDK2168564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb456e750bb6bb2d59441bdc9c3b315d376016165f29db14879799fd7bff22fbf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM42K2182276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296384ffc45f402dd6b699a8a16ebe488dd28f866ca7cf9c0200ac9e075855ae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZKDK2138519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc006d16e699e201d4d613bc04e57b1b004d1a46888975f96e8efc3b6ff485e84. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKN6K2002789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3695c327772dfedc4b8b6b56018cbd6c2f84811d3fe13ab26abe77147f82912. 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/UKN6K2002788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a99b57a315d2d9ddb0918827e7998e6015ff47e792d5727a7b0c0c14304497. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/UKN6K2100804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd890ca3f5cb78a81834920e9c258e3ce5287c8841400b3204837976375749e30. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/UKN6K2200456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae388f25f3d23cae1958bc2247c33c8eff12e312456a6f5c356169e5f3dc2b5. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DEH742220510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f7d97d3b5e0263fdc8d530759148ccfc9f451c035893fbe6f60df5aaab1e11. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GBJX32267503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfd051796621d057da467f3f13f76f0537ecd7922131aaa8e04eba099b88537. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/NLD1U2380001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a1ea8e4469d1ed918af3c238bf65acc8c296709525db82b352ef4131be7b39. 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/NLD1U2380003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643e0bc56b1aee4a50bbcd2511ba71f42be6a9c81ca1c6dd4e3a9d180d127c1d. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/DEH742315859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c73da9014ab2f9381f4a49c64a95935c36d9b282f49691e471f600320b6c7d3. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEH742315862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f015061df9552dcc829f592448b5947ede11e93c8d06f6ba3842906f7bef04. 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/FRDX62309300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc8b879eb8a8a451502e7c2484185c0324b837f17cd6c2a17fcfe0d67b8244e. 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/DEH742330113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0ce21caf193e74347d67b922c3d2a7661975d87f2cadb46d2195246ac73c1f. 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/DEH742330114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1695147880f9255646cd45cc2eae892479edc7a6a8937b94dc07baa788b922. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/DEH742330115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3026c6faf004e25275614f2e775ad29a736747d845d11754be06f682761c89. 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/DEH742330116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0686792e2f3539078d57c6724660540f3f745644a6d79adca584173a4f32cbe3. 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/NLCK42408294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce47d47f8c8c0e010a5a12422b8ba1e9b14f246b57409422f8731ef4e522dde. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/NLCK42408295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0686792e2f3539078d57c6724660540f3f745644a6d79adca584173a4f32cbe3. 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/NLCK42408294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a05597410887e6adb148f7bb99ffc84b93b75d3a4f70a36f6432b709f02654. 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/NLCK42408296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65a706d768f508ed87a4a12ecdc6cd9ac023feff17e16d3148bfd7873644121. 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/DEH742437984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8677de648b4739aec5316b769cd530a116a81144dcef22e865e6c92c228ab9. 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/DEH742437987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47be646647486bf3b136d82e4629843ffe3bc949bfe8af80b2a0e9b6e9b1a9fb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEH742437990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee2b9e704ea033360ce79c7d06d85cc63d7e96027e29da4f83b697d9ca06d8e. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/DEH742437991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18955334292131991eab79915b92bf25b9a734b5cb90b43a2eb0589b9e148881. 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/DEH742437992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e933739ef81dfa6fff626bafdb598b74b656666471e0b192b8628d8aa0d017b. 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/DEH742437993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa284476d205071bcd4a299942c70d44049239b53ee62757eeeda7052a4fc8452. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLCK42210357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f015061df9552dcc829f592448b5947ede11e93c8d06f6ba3842906f7bef04. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRDX62309300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8ff6deac9f60505f65562306f0bb6101a3d8a68c3603d3dbbf0049d51d60c4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS632232546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6078008d69c38bfa69799598eda6b07df075959066084a4bff0a8b72732a1fc7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLCK41069749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa39af1ebc755bc12d8a908c5f86215f12632c8ac6ef50ea67e69c1cf2bb62ff. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLCK41075387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ea18edf0c494a95a908d1ceddca6102882d019d84d92c051bfcecfbc479698. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEPI82022261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95fda40d11f032a52d2f71eba68ec1aefe7c659d341e158f6bcdbfe2a06ec45. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMHK2055209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b57947863e9c8a07b48f4c7611143144b2af4b39c01eaaee22b3f26fa7e9ca4. 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/NLCK41092346.