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 0xdb15c766550b9535876b3760d84328178641a49400233fff67be3f5979b6ef8f. 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/a37d7c49-d18a-4227-aaf9-da24d41993b3.json and https://artists.proofprofile.net/proofs/artist/a37d7c49-d18a-4227-aaf9-da24d41993b3.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 0xdc68a5b420790fae718a2477de0f71903d28302734a254ae9485df05ab6c3a40. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZMEP2139826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22e294628c3b8035e0a753e501f0bf155b266376dc2836503521c68153c9e8c. 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/QZMEP2139829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea91126a096eadb0c2a289890839ac67a0c7ab69e08d02837fa917438a3d809d. 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/QZES72325593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4857de46c623b5390eea7c8cfcb9ff832eb4399c23a33dcc56e43ee46dbf42. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZMEP2322860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd671326d7e6eb1203e8c2ddaf70577a006d985c6df2d7733794396c63db8348f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFYY2416408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0383aa52288632ff9a1c71739f166dcd9fd40ab101fb40133967fdc00917b92b. 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/QZTB52454495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd27cb186f8483b1cb7668d5418000763ca42daecccfdb869dad675c46dba138. 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/QZDA62564408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf474e778a12ac9f8cf670aab521362d7670f6b0ab1484fdd18666ca30ad3763a. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZDA62565914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5c10db02ecd50b59c93a9b2cda6ade38d1457ed94dd82a4bd8afd0d09be941. 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/QZHN92517587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdfdf59c1e22d45df1a10d28b945b02f95c431b9c912162b4664bddb05b2ac9. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZHNC2585676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61da19af47b556ca3131f5b3611de734a9731dd3e7ee2119fc76e2f152949ccd. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZHNC2585678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1713a642a0f6dbb4d37cf26558fbedd0f0ec0df0948b3e108fe027361e47e19f. 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/QZHNC2585679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4f7e0b0abc457b0284cc127eef9f6720708fde5630d7c1fd4aebbde1ff6b1f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHNC2585681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c3b50bca6ad70f5b091e38aa305df631f6c7adec9bfd1ab46f29e08e7b3a06. 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/QZHNC2585682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a5d31b34530ad87e6411231b36a96ee17e00b6b51cf70b687a13f3b419aa02. 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/QZK6H2535643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147ef5a7d6801d66d6b2ba915bcb7ac4daf8f20be483e6cd80b066308f23948f. 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/QZMEM2537119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb366b2f81d63cd6cd7db640886440a0f622be302ded8f81e2514541283455aac. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZMEM2539001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9039701ce3a99e92d8e144fcad16c48560cc15b880e009a9713cfa35ee2d869d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNWQ2518584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c47f2108c8caff43573c557d4798b782d2b9ba1085fd9dfa5d133827222c50d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZNWW2528763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee043bae67c8cf89dec79d6b5f8e1a61facf8355c0db5ec1266e90685e975dda. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWQ2521605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29f55efc0b16dc5cc5de7df0f75503898180da949bab77df54c7cc700a9aed0. 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/QZNWV2521947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4eb8bbb654a9110ef9539704a9406a20b7e166d4c46d05c2eba71578d517e9. 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/QZNWV2576171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b819c2998a9abe2b713e4d0197ac1abc1fcf64d1ad6338578076f23f49f81f5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZRP42529767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc13daa511887ffffe7acd7a1083855396c17b547cf212ea669e5750ab357046. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZRP42532344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bff097e2be7ebee21a1995788ee6a2645896674affc1837a55fd7d6a0ae1cbd. 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/QZTB62595029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a438070a0661bf210ba8f50dfddac1723aaae8cf545864387b416fa1a4165b. 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/QZTB52562268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fca21232517c79f464f33fdb69c35c4db34714eedbbcfa2398b4f955a7ceaf4. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZTB52562270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2242a37ebb34dcd16d53269a2e7b04e032b45c27c250b93aa91946467893030b. 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/QZWFH2508836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054dc118ae15259a3f12aa23704c28f2fa518c25cfb13785daa830b91ef2bb17. 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/QZHN62398215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc503fb7c5bc3e30e353d99391772237dcdec37a320f1055fe5374b4671fb719c. 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/CH7811101353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd944ea62f307d7b949af416a1f3e433e384c0fd9d6c0c6721ea03bdbfb7a719b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CH7811101354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b9837590b09ef4855aef63c1078bcaeac9f18111a8d3affbde1344fc3d54dd. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/CH7811101356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c49f6355e5d48a73b544958d607265c926ad1a021b482191438a122614ddcb5. 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/CH7811101359.