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 0x303f69eb8012cd1f6d6600c5e1c5997717bd3c00ba2dc685023dec6fa43e7fd8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45e1cd02-25dd-475e-bb19-64b4064f323b.json and https://artists.proofprofile.net/proofs/artist/45e1cd02-25dd-475e-bb19-64b4064f323b.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 0x70cb7533227393efea1989c846458dd15d613757d2af317a6e39b21f7b6c2298. 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/USLD91760732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2200782d71755e4e69d03bd98cc4e8615f8c5054dd2f7ad87679dda9d018d59c. 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/QZNMZ2289859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546f48baf689bd90dedadbab11dd9ca293ffca86b56f281de88b62152ed42021. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZNMV2394464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0031877073aaffe779a75131501dc3e53e70c6a39033dbcaf80f6b05b7018afc. 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/QZNMV2394467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c26d2b7b6a05041299d412484fe5f7d39d6840d4be53245a89b6f7fb40cb15. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNMV2394469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c50486ff1395bc4ed660a7e06430c4d4586429707927e7d537cde76b96ec114. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNMV2394471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d5b283c6f2d9a4a6688c3259144c2f31fbe1a109ec25e2f2d19fbd02a186c4. 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/USLD91750962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44e943dd8a29aba0c46e8cf950797f1658aa16005b7fe347bd9d9dcd265ddae. 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/USLD91751670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089970e4ccb816f73ba7036bc6d673f1dc5d85557f82b32127175c73b7628ffd. 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/USLD91752515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5b84e69009ac2028511557dcfa345b9fc4aac2469f44f0a20f2f1484bff394. 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/USLD91752520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5d4833a8dc38aa21a37a97d44e312198fd1c79088b6886319d20dd37dbcbf8. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/USLD91752527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11dfe919b30fb3fba403147c9598f3ac11aee22b5c78d621de21691e66f0f99. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USLD91755484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9dd006fd9464fea6d928409554049705186b62fad1de280bf022fb3a54c63a. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:00:47Z), 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/USLD91755488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c57c2c2b23bd88bc9adf75c49e44bc91f80d8321a9657abe8a322d5bd7dbeab. 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/USLD91755496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2146f28565c0b06673901a61e76cc86eeddca7c78504e178717d33e6354175ac. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USLD91758096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9423506de03b66a0231d3a7b0c6c0301aa5c4d5895b45b506e96bb555487d3fd. 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/USLD91758100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879f2c4723b1ff930861188a0abf5a286e1010d72f6be3b5954c15693c6aeb79. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USLD91761754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2ec8a580852600049d4c48ccec7aade16711217b9d69ca88bbe2cf384da742. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USLD91761757.