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 0x7415bc960def6a3c1e5986f204e222bc1f8090867ce13c35fc5d707eccd1dfa0. 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/e6857aec-7f72-45d6-9c6f-4a58dd3de724.json and https://artists.proofprofile.net/proofs/artist/e6857aec-7f72-45d6-9c6f-4a58dd3de724.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 0x881c06243bb434ecc3975dfce07d48f79d2a37202ace8e8f0b882260f685bff0. 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/TCJPI1830282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881c06243bb434ecc3975dfce07d48f79d2a37202ace8e8f0b882260f685bff0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCJPI1830282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1103f79fea9a0973dca48429fa90e192613cf548d3831f5638ffa0aa063ef491. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCJPI1830330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec2d04eaa5ee22bbd4a25430c91211e57f3254cc52a5ee84c92cc141b72092a. 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/JPG101900332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a7245a94b1c3a6c096ab7afbea9fddc95cc35f74883c6986f12dbc4671365e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPG101900334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31759eb89d529c1b6ce59325f414a931c5fc01ba745ffe2850ad923a786989f. 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/JPG101900335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf009cb67d743e43d251e988f6855363a077083874c2ba68dbeb7809f34d2b9df. 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/JPG102000634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf686fd0bb5734ddb1e378271e88e9340f4008f35b04ec059c12b1ca2acc4fe2b. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/JPG102000635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b623aaeacbd8c97b3f9d66a1e5429eb80c8b3d2d59fad945540eb7f07c6457e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPG102000640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df20eade5da693022991c12260a894dc3ea5865b7401de3d032d05fdc994c6f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:07:56Z), 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/JPG102101503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787b48101bf10be63a0a34d8a6d66726a5f1f2747894880c24002937ff9e7c89. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPG102200166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e960d736f57f3b7b875594f0c16a4e9de64c4946e3a66ec2817596806f99ae. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/JPG102301401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb8cc0e01169a42b27325ee60421d92aca5940935ecb1e77e9f9586359bec8b. 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/JPG102301402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7218d44876807d5005b76265c6bf6020af6245df6d1966eaf60608f62f7ae1b2. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/JPG102301404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575f8cc86214c30fb4d89d8e2d8062480807156eedd5bab72c6727145d5a9c88. 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/JPG102301406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed0118c618fbb07474a14252b3b30b4073b6e0aa8ad0d7ae3c13e87d1b3ba62. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPG102301409.