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 0x9b52c1b8cc6fb928f0964adccb66500bddf8b379ecedb2bfb088b6fbe8d08522. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/702c2687-fe72-41e6-aa1d-17827b75b034.json and https://artists.proofprofile.net/proofs/artist/702c2687-fe72-41e6-aa1d-17827b75b034.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 0xda8279ca5225c0bbff6980bd6c6233cf2f3dbc8d7534495a9f3757d5ac63d1f7. 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/QZZ8A2409403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d81c8a299cd6ab73d804d8efb3338b886df1b142f50a9ffb86d2165466a1089. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZZ8A2464272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22edc469c0ffe6b1c1d247c8b2bb7aee1362d184ce8d84721280d0a25956ec80. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZZ8A2539286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01de02def600377f3d89466c119f97e99af761321adf0b2670ebf5346ae44986. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ8A2539236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c203a1144b053656e7e5021f3cc1248cf6466b7a48d019f9d2f50caa3393bf. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZZ8A2539270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7bbb6498b85e2d9c70953dc43a64fda1ee60700005c0974d1ac7b7d3073b3a. 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/QZZ8A2539247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb7734b0c553dc4d6d7d85b16036b79eeeb597bec7cebb7fde726b7b589bbd5. 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/QZZ8A2539281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019206644e100d0172c7873ecbf731054a5e38dd97903454fc75df77b311c88a. 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/QZZ8A2539277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b27f3e388ec941ac3a20d690fe0be8d77ccc4a23165e84f9ae962429c8637be. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ8A2539299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a4c0d2a2ed72f4237f2ca05a8ec511fb4b40974a33c3b3d817a34e7bc6a58a. 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/QZZ8A2539294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff023c73aded8fa4674811bbe6105062078085352e2ba094b7aee6147915f137. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:22:05Z), 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/QZZ8A2565938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadb6129141ec4864d61ab79631ab8ad7b641bb40244ce60014ee5c0f08827be. 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/QZZ8A2565976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ef7576d7d0a75746be1f7e090c62069d781fe42cb1a49c92ed7a642381a4a0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ8A2565967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be4682920e61b3e43261d908ca8944dc5f10d220de10be6baadbc4dcecd031e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ8A2565944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a397d4a3f8fdcddb804d5a8782b6332866b7f927d851b62db1c44b3069b92a. 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/QZZ8A2565946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfebdf236cb46ed0e7f40977ba7a2a8eac01bde7bfff37d52e7e76789a29ca0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZZ8A2565933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9bf97af48bff33a161580ef8c77c38facccba297a7d0c15aa928fa484dd143. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZZ8A2565940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f97335803b3d4489bf638cd58b57ddc03441eab304384ea20879b4f7d1e3bde. 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/QZZ8A2565973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b77b6faed2cefa8cf92bc512b9981559bb7e733ab06761845c075fe0de685d8. 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/QZZ8A2565926.