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 0x119c048baa0876603c0f454b96de05a4197d7eda11520fcfc49fda158130d88b. 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/2a0dd625-d8f9-42ba-aa57-73058acc5bb6.json and https://artists.proofprofile.net/proofs/artist/2a0dd625-d8f9-42ba-aa57-73058acc5bb6.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 0x1150ff631e657a5ea89e080188ac95b77ff10bc0104f483a4299ec800dd60be9. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DKK1C2400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08372859357592b9115a1ddaeb1b3b877fdc648b64335d1406738d26e88adc3. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DKK1C2400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d81052f253f0d8f9e0cb371f0fc36a218afbaf39ad7ee20591e3c9c92f23601. 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/DKK1C2400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf129af31cd5da24f351e997001444725b48fa2ef4213217861642aa2f0dad725. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/DKK1C2400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ace7b54101408b846b0132670e8a83f3a9fe5bbb551c1658d5c7b06fc3539f2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DKK1C2400273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060ece925cde73e957a95e3cde3255c7f17eee1e2f4b8c7f738b841468277e30. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DKK1C2400275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593a34d7b4e2261171361429b8b2121552f385bc72d3d0b1c3261f40025152e6. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/DKK1C2400294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47069e2ad3835b22306b958c2a299442ec4de3c19b70247e0f06554bd6f89ab. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/DKK1C2400323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbdcddc4c44e6bdfda7ca6e021e267d916a93f40c3f31faa0f9b64c1d2d430d. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DKK1C2400324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1eb3ccd9d0e9659d4ea80e29c0b38c28d2569982b5710a4e085a19422e13a33. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DKK1C2400341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9887da9da051279758c04a4c669ab8705761bff6dcbbbc1fcad34300266eb6. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DKK1C2400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a13f02c965b5d16cc18ac9f8d8083d3cd60d88e0f82e5b105dcadaa81145a4. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DKK1C2400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea520adac745f9d406a81faffe32e5858405dccfe2928b870315cc38906dcc43. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DKK1C2400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ead3e1b76f25ecf65132420cb165ff601491a8e68746fa36dcc65f02315b49e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DKK1C2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce64f81a45742d5f26a4c3ee247399eef2c288824816a8c023190395fc614a6. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DKK1C2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f79ed7c10f161b98f74e2f104f2c0f3795e10daad6f2efb5905c267c48cfa5. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DKK1C2500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e9a33ce11c2dc9730929e45b4e229a9f0e1aec82fd22c2e17cdf8da953a2eb. 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/DKK1C2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817ed11976fe7594205c4fd2a6977fa7c3611b4c45d51abc03c3d49e67288c60. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DKK1C2500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0d05c3300e6afb71dca2e20abb8d695213aa7c13632462b234909efb217f24. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DKK1C2500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d70df00948d9deb61efc1bad47c3b317158a71911d5f2665fdd0c47f87f6c61. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DKK1C2500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f7746b07183e63953134cd602815757bbf791e02a4a13ebd452cb9c908b22d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DKK1C2500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf780c048575c2a2604cd2acfcac34677454164bd401d891ba4b8f8fc4363118e. 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/DKK1C2500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a66a41aabb4361131d6e246ce5564839928b14b84bc1725a1cd9f28ffcb20f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/DKK1C2500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35827aa53d1073be8fa164d62736c9005181c3d8c682bf8d41c841b73a11ad5c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DKK1C2500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5b288746ab4349f6f904f0449aacc5d3be8b22e480eb7cd4bf44ce7c6aa324. 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/DKK1C2500152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1c3857c94b83ae68afbcc84b02eadae6bda53c317b8d9cc9a360ed70f4d2ea. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DKK1C2500153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee5efc51cf53e412a7557a656b46b3872f7143d4bcc459b51dd9e823d6e866e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DKK1C2500176.