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 0x9d43c4b1a26268c07e833c0532a1110a2ad00f6bd57012fb9ffd97e98d10691b. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58f7d0bf-3330-4a3e-ac93-cd5e98086b96.json and https://artists.proofprofile.net/proofs/artist/58f7d0bf-3330-4a3e-ac93-cd5e98086b96.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 0xaceaa588a9265d75e62366ed1983453ebfa300de696abbc8e19f9359d2d79010. 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/QZWFG2442068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527264ae4996b2f3c01113f937660afb83ca5ecb6b6915ae38e367a76a1e4a0b. 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/QZHNB2512725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445afbaa06eab2b8378040e092fed142a1f9266aa25687ebc574ea095079df71. 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/QZWFG2442071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0913150cd51abe816fcb4c9d3bb46991f795025e5d978d5e75d2411b1756dc8b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZWFG2442072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff25a939ef158b9dab6ff275c22ce124f225adbf9c650ab405b4c492c59c773f. 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/QZK6N2523511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abae1f414aae5ea5a2567116b542ca363f8d6170575927d6a4807289f09d06f. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZRP52506269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fee1e28a486c006ba4659562fc087569a62215ef8e3b60dd28364ee07c5903. 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/QZTAU2580549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55313becf47340eb8628b1ae1f0f98c305add963b7f71ee060dabc5ea9319e5e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAU2580550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521cf044112b4facd7ba1c86b875774223fb1ff0dd668e9432125928ba4b91c4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWQ2576989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9b6b5b8052145918dc7ad2bf16d971f2bc23707e0d65e8307c513f73c9e213. 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/QZTAU2580551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375af6b594e6d1069333a97c9a29da233dbe05c3726070a27e942a4b9c9ad7af. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTAU2580553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ee529d8a1eb16e7492621ace685853912e60d9fd117c16f32d4ca1b104da6d. 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/QZTAU2580554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9c80e14bff0a8da7cd8147da1e16e38396f65d93d2dba386ba4b075b2bf753. 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/QZTAU2580555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cd8636d01288d392032afb83448662bb1b238be190ee405a26825bdf2f3fdb. 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/QZTAU2580556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c592d6808cc7fecbd7a3dce13c700ae3daee4fda185a99d1c2dd8423f5ebd1. 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/QZTAU2580557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abae1f414aae5ea5a2567116b542ca363f8d6170575927d6a4807289f09d06f. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZRP52506269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fced30404387a15610543f5bfcf5ff2f1532f22347acf11610ee97b8863469. 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/QZTAU2580558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b3260d5ce831462b3b8dc791fb48f5ce87bf0a44f39303a6ad18eddfc520e2. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTAU2580560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06391164d70a84605238e52405568b0b742f1bc4c1b5ef2db75afd8f12b3f39. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZTAU2580561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff25a939ef158b9dab6ff275c22ce124f225adbf9c650ab405b4c492c59c773f. 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/QZK6N2523511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03378506438cd0b569f057e4a9e09dd6b52edf2e5fc27c2232cd1e2849e96db5. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZTAU2580562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5659ba7447914332d55694cc3c2d5d45079f9f728a9a5573619225227a1afcc7. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZTAU2580563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3860036e83fcdd29a7515642696959900b4d750a30744d2525fc0acb9383a0c1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7R2528860.