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 0x00be1893d0967f7d30fe34534c04be3b59f39996be74c092318fe689dbd53b97. 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/b93d8b46-cd50-403d-8746-df0001f98e25.json and https://artists.proofprofile.net/proofs/artist/b93d8b46-cd50-403d-8746-df0001f98e25.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 0xfa7f8f9e5641aa79c20fe3e0f6cc52480697d67ec5ca4cd743878d5b571f7afe. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:10:02Z), 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/DEU671101270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fef2d06e1b2eb9313b8667182ffdccbd98ea875ee4ef4586d2f83cb55ab4b9b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:00Z), 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/DEU671101276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b9f9d704d91290216a48abcd6c74bfc1e8d1fcd4a7e4b2cb352f5026161e3f. 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/DEU671301088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3c17d71a332ced714d3882634fa644cb72a101e0a3638d95a7b2c2df508675. 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/DEU671602014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a95294a8132480be9ec481b8dfe48acc37f56dd5761ab7aaf5ab2035270fde7. 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/DEU671602015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30bfb90c74a79c59dec9264091245f2677621dba3ba4b91374a22b0eb5202f4. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:22:40Z), 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/DEU671900958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2562bb8d03f157ac4c5852c007d02ec8b214dcf9dc47f86058b9cde5259f4bca. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/DEU671900959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f14e34be3cc84fc09ab01c246f1ffe03d0be9acb3aa862c670d37200a4c012. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DEU671900961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5672049a5fb2adaeb5ef10a73019c48330ef1e75223e69bd3f5c42aba942e9f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:48:25Z), 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/DKD3Z0019739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74273a2bfbb355a97770eb5c49c63793ab2d2f10f03f2bb6ea33bb39cbac11d8. 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/DKD3Z0019740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b73af8262758f65dd0747d25392ca41d00183f701e340bbd04675abbe49f431. 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/DKD3Z0019742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe180eabb53a047b5a39c3e5949dc687f6aca02a15af5379172dbc53a7ab133db. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DKD3Z0019743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b50c9b9c06da3d8ab2d105de1587910a1d6802c53d7c112186576aa104e4ebf. 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/DKD3Z0019734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0badc9467cbaba2c6b7f3f96260e0e5a4e4315ad52dc26e7c2584f6f4388b1. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:00:55Z), 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/DKD3Z0019748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9ca44e67f339bd10bdc1e46b0e5331251f4a67ea18a602fc4c0f8a99865ba0. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DKD3Z0019735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a500718043ccb91c8e3a8abdadce35993f6c054e93397a215039e5ee55db410. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:48:15Z), 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/DKD3Z0019750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fb7531824ebf2fe3f1940e5cf27d64a42fa7343ec6b2ddc63d1976a5188e65. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DKD3Z0019753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4609ba02b2a3f7e4b8c0c219a8875e87925332ad19c22a4c460f7546b436173d. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:32:33Z), 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/DKD3Z0019763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876d2104e1144699ceca7ca7f03bedca6efb824bdf113ec0bf43d5afab1b746d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:41:52Z), 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/DKD3Z0019764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ae11e8ecdeef55a776d8b41349d039dd41801383fd1dab89cb4c4fbffa8cf2. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:52:22Z), 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/DKD3Z0019765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ad61329e584f5143419fd8c988082cf71a4bb551d4aa6060f0ad515629ecd3. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DKD3Z0019767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb467824121e46c08fa308bac98f48ba45e2bb05d7eebe557e94529b7ad2584b7. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DKD3Z0019768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7e9b7c75acfbdc054f0b8dfd8cf68bef09f0d47c4e4324eb02e23cbe5b36ac. 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/DKD3Z0019769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe846130d0926c7aa4136114801aa47abbdba255e4f305eb28d22e327321e260d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:39:19Z), 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/DKD3Z0019773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359952774ba13540f1c9fc9db3cb6a6b5ff2a122b4924b5d3de7ddf7502bb8c4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DETB32401359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd18f694b008eb376bb29718cdc559bd55347d969e08556fc640f377163fb1e. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:56:13Z), 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/DETB32401360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d03afc65ec1430d2dd2419d504affebdfbaf5e3be489eefe7c247e482875ebc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DETB32401362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde269e9be147a9e6621fb18a0aafa3bbb020b9428307c754e4dde57539278e6a. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/GBKQU2551504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4b729abfb10ad125570567f786bd4acda635d83c27c3e855ef8d65f837fff6. 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/QM6MZ2445088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf94c944ff0533feb7f6db537686bbb03824c3076423fe8fa2a3873edbb015f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEU671001754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335603ad8f8881f39db8e1773575a846ec2b7708fa239831bf151400ca64cd6c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKACT2330890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970030d7989fe8a4c644aa4bf7c9f7456eeb3e4e79f2eacdd4830df406450a22. 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/GB2SA1000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbea44439f3dd4e9895ec39fa002227038be0d8e30792dabe334e33538596657. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GB7RM2100019.
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 0x1adb389e18a84af95f70b3859486a5c29dc767f0f1419982e2fa6277a4f05f45. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/UKACT1864508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcf4b3e8bab7859bd99243664c235c965368a7577f785656bae213ec0b8b03a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/UKACT1864510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7be60ebfc8c17ff15e67f11442a0a61c19276388e76ecf1455b66dfb179441. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USA2P2139673.