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 0xf03eef19bf72927c33a0e9ca0f621420077f5fd303cf9bf931422590c84f1dd4. 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/38f4faff-76c6-4668-8da5-7ed8b10cbcfd.json and https://artists.proofprofile.net/proofs/artist/38f4faff-76c6-4668-8da5-7ed8b10cbcfd.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 0x2af240bee2a1c01e10fb079a96241d05c7b9546ddcf14543c93c239a5cfff51a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SE6XY2386826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbba8e31f23fe1ff3ee8d12f76ebcfe39ff27f50376e37f634a80f28f4f46de1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SE66N2359035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1541d3b31d96c98347321480fe011ea14a5ed71bb2f25c2a412d459f693f0f09. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/SE6HN2426232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7148fa53b620c121d6db3cf5ed6053fe998cf774186a57e506660e284eac49f6. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SE6HN2426233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123626dec067cffd6d9e0bc201f849dd6ada0e35dc061323a26b3a7b0b7b1a09. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SE6HN2426235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47851e6a22425014ee2a7067dec6befb7411bc126f37e5fed03db8c66d4b6fcd. 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/SE6HN2426236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456553cc27f3ba6f3ab0d36983ce8f69e788fa08e866f4df447cef502e654d7a. 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/SE6HN2426237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07b309a8a180879ce7b3024e82a29a0a70d4d494843f526aac07bf0bc787d0b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/SE6HN2426238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e71c2fd5e4ed83cf44b0ccefde50c2170ceaa769e35b20e19d07cf4f31fc18a. 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/SE6HN2426240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9af132d59caf095322b695e6bd33bead9f0da321f5998abe98d128859f3c97a. 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/SE6HN2426243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8b4d08c97ccad51aa4068f0d7bd5645487bbd49d08d2fd5c7603208ed2aa63. 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/SE6HN2426248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0249df07089bc2f2c2b50f410826652d8185b3ed506c0ecd7c6c9d7ffdf77bfe. 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/SE6HN2426251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cce380a0345901b0dce3a727bb50230c3f334aa266035fbbe979b2e86b0977. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SE6HN2426253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213873a4884d767bb33144f3fdd29fde9ba792b51958a2dfb06eda9a889065d6. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SE6HN2426260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc464011ab6f437669557f1c071203360c5326441ba842a5bb227f3b4288627d5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE6HN2426261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596c143749b02c51d8160a97fe61e78986550bc08b8c50037d23ff66cf1c3eca. 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/SE6XY2530206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86297aeef2f04f443a17436071a8ea7c9bb81883bb5c57a1b54960bbc1fd1f4. 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/SE6XY2530207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25316a55580515a503e4c86bac03f7e415d4cac213ffc0ca477b58409e333916. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE6XY2530209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb47e068220f3550750688777cc9bbc2938d13a88ff9e8fed95fb8941a2ff4e. 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/SE6XY2530216.