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 0x570bfe34a751ee210841ccd5bacedeb70c8f8cb9221fb36a6d7d463b398f99cc. 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/afb91cbc-7ff9-4339-a682-2bb6e62e9028.json and https://artists.proofprofile.net/proofs/artist/afb91cbc-7ff9-4339-a682-2bb6e62e9028.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 0x69acf328860fd7204aeae20a1512d023635d5cc204c3770bc7726a9d7f7f04ab. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAIR2445072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81750c806428fa7438fa0152dab6ba83006a154816ac105153c9059859ca44c7. 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/TCAIQ2445229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6837dabfd11286fbacdc1f03e116882a095061d29d94f8bdf450a4b1066d9231. 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/TCAIF2400320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bca9f76770e0572195b0b46d8dffa9fce6f661efe3bcc1214eac082ce68bc2f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAIK2452579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea5204f08759d9096abf446c28a5ef9e6d1b89534531fa2a0e429caede82294. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/ESA122492552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45125b848341b496905dc18362ea69165a1df8c787911bc73f2d13b85e57e0d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/ESA122492554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc21f2c72ca832487ae52a891083dae63214fc644a95084c35237899d85bc20a. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/DEH742423428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0e2d5bdefc0cc4e019ac08e62fef943ddd997a5f3bdbf51ccf9a640c040b20. 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/TCAIU2435234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dc36fa66cfba11bc0ea30bd50b9433916bf46f4da51a3e65f9d7fb561f3330. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAJA2461339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8f306ec3762f3932ad39b24f9811cd2829c44542144f3a9f6c95dbccec718c. 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/TCAJC2438943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4a7692cbebbcf7b81ae69580c64e90f12285e9c892e38ff66daf4206bb1df4. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/TCAJF2529399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd282d177756906f0a184deae2338770e85f62fce40cec4c507966057efd23f15. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAJF2529431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3bf8f19852b05d27bc6027cb9fdfd570f825ae2287e12de5691b3ce720508f. 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/TCAJF2529443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45705f8260d608606d15a94a5ce0a5d52c873bd7eb1642e5e949d734d7d715a. 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/TCAJH2570601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33cd31870f810666d3e641cd56b2bb5c31856dc391a68be99ed2283759d16a6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCAJG2591529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02af9357b958143cabee2a9a16eec47c912691f057efa36e4029add27253565a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAJH2522458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1036e60ff7b5e63f1c8559b4813206cce9379b38f70e5f3663601c51dcc4fc0. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/TCAJH2571868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e1b1def405c28c3ac576975af947d1b557f67d4b04a5699a5afae9192461e2. 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/TCAJI2576054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bef9dba75456929caa2a484cb9a7db23e255318de2ee2005d479b1fc89d4fb8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJI2576107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f62435996f89d45dd431ccd2642d9060bbb71f666656ef79e920df9dab6851. 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/TCAJS2530894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f8fda9ea700610e604846631da5c4be9a7eaac3f1734408490094371ca2aac. 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/TCAHJ2347972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292138dd2602a56c72f918479aec832c99e64eb9f910334c86731577d4243c71. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/TCAHJ2386570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35c3f252b9ef997003df0065c53f85d0789cab39cc768bc00f6ee8383c64a79. 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/TCAHJ2387235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5339e3740fd809885e8b032adcf15cbf78eeeb0dd0ee91e3513217430332f5b0. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/TCAHJ2386964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02af9357b958143cabee2a9a16eec47c912691f057efa36e4029add27253565a. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/TCAJH2522458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59223f0cdf2d09b31fdc489db08d2cfa1119916a4cfcf62d3527203fe918563c. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TCAID2422034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d01e8e530baf38b4e152edce9d6168c77d68f49c8c97b658ccb424d411edac. 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/TCAJF2506412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb64ad100aef8fd3c63203451c36748bae5849ed5cfcf9237b68d66c7647d734. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCAJI2576066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefeaebdc7d1bb2a068935e3e0882a9f86c1ea0a7c1b4767092701848ab3ee438. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCAJE2597255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f89c0bb27c507b4d85881c3c82377a8a6d74b52744b257b3d56e8d967ed3e7. 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/TCAJD2433033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bef9dba75456929caa2a484cb9a7db23e255318de2ee2005d479b1fc89d4fb8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAJI2576107.