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 0x64005b6e5b93305a376992d748bc6ba2b63a128dccb0b9517c648d7b4c0fa2fb. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1781c613-c068-4e1b-9d04-d77c0daca6c8.json and https://artists.proofprofile.net/proofs/artist/1781c613-c068-4e1b-9d04-d77c0daca6c8.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 0x531d336bbeba88c4adc9b8db3316d794612de39e8f40525d2a9fe4ec1dbf4445. 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/ITI502400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1f097e9d12cb4d00466673235030852ab7ce95f6814c1b3ef8c8cc7b91dbc9. 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/ITI502400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50f891c40e1aa9830750a76e85abc9addbeefaf51aec309fb83b3cf6e47fcfb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITI502400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3e088152934516bca6afdac349823b29255d834a271b0ae2589eadc997cf41. 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/ITI502400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19c9c23da90873f181b2d1504bc5e7a309899da1fa3e4ee2da9308519419d86. 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/ITI502400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3a0a9f2feeb50d80b00d203bb1bfa8344279156e23ca728eedcbb3695a9503. 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/ITI502400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2778089a01c9ec6bd50a4d232d11f562cb3f3aaa9a909d4f370274baf5b889fb. 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/ITI502400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d8fdf953bcfef01742519a40b02cda7434308458ff4b80675d92e4f7ab657c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITI502400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840b92b6e8dd80288ff3f2ba9a50ae4159d0c57d2ab8b400ad91e2166a49d57e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITI502400006.
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 0x43b379ed55922988045c662170bf3c7f31a1ee9891d6f1b3ebbe4439c8e30b2f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ITI502400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177617402959eaea18f97d30b77d352ff27bb957356e7e25d4ad9a7da2633003. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ITR009900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295a3a39b43425f02143cde33a240dee95361e685d108a2e06ace8079bcf3272. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITR009900181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa063c3c684a7809735fae579782d0b1baee91c76f2e4f5dc60c206bc6c49ca47. 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/ITR009900191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca3b0e1b1416262cd2f2b41a9f66405b852ede832192128fffc071a11abb006. 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/ITR009900171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cdba252344059dc8f1b0f7e3fd2472e0c9a5132aeca13438cd31e89530fef4. 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/ITR009900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f225ef0b07920e178c4ad9dad515d3ce955ae42bfcd8ba352e099dabbabc74. 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/ITR009900221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e62a3ec213f36e8fd8df8297b14085e9fd632af455b06a25885bc81c91da6c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITR009900241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ec2e9ee2d39b8668bc343f998cbb269499802f17bcba32de4ef617063c4b73. 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/ITR009900281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74001f9fe6cb95e4abb9f81e7d2d451c24b2e781369ede5b56fbf10128d39c0e. 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/ITR009900292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd685124134224e3a8ac66a05b95cff0069a67fa07c93eee14eb99518b7a94882. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ITR009900251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e040a48c7790b74a82dbfcfb355b05c25c4932f829bad38879c3e9386da970. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITR009501251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0b49406fe7b6feaf810faacd00624de6053f3f04f1c1039ae13eb314d34c9c. 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/ITR009501291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689fced3a64329b94c77fec7e0cca41937b1faa84c7915202dbe577bf5f0ad82. 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/ITR009501301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3bfcfac7407e05732414c171b32111de65967e99b5f69ca025152d4fc5b009. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITR009501311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a4dcddf372bacfacd9518fc4d929324a653df41c3930a4cf48b50f74b1eceb. 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/ITR009501321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4ed8afd2dd161fe5a840137e8c10c460ad977adfd022de4cfbca4cc6c8f550. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ITR009501241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584706738a3e45a260dce46d139f72e70b3b1ca760ed59e358c296da283bcd57. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ITR009501271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66b80e26556ffec2dfa8e6f5edf0b69d8c3ac9cac9e6d0770faf73d613fd9b7. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ITR009501281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c3da7b171a529b12ee66155a6c86725d2b890cde309343f6ac752e5a439ff0. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ITR009501331.