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 0xd6edc84be5b443a2525c87ca8d343b629013e59183df96da46717e6027fe1322. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29f49f95-06a7-4004-af78-8a1ef4929146.json and https://artists.proofprofile.net/proofs/artist/29f49f95-06a7-4004-af78-8a1ef4929146.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 0x8d3ddf632a1b35b2ca525bd27907bdcff038c93791fe1e0e9c7acd0501ef4fc5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN42251272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae725c54a494fc800fb3d1222b4a5c13a00d900d8693efbf1a5d9ef1a01ab0df. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN42251273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172aaa842d51ec47e021fe0085f79ce4010ba4da6174d47236f61a4baa8cc7e3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN42251274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1daea8ab3a63c2b40a569f0b119cbe782338462ea8201cc0d95ec9ba5c9424. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN42251275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc18f827c99b97fb1566ffb47dd9582f244366f2136cd0c781d1867e3dfa9604. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN42251276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b23c41caebd1e1bf4f248c0480df39a38dccd28cee764ff3071e1d4d6c4d4f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN42251277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca4da74e02719ed12950818dfbd15940c674b888c8e53cec9bcf690d193f468. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZHN42251271.
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 0xeb081f53e7215287c603a026112ae082629575772bf1c5eb952efed5a07f61f0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6N2277003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30c87682dbf7e2cb80b63110fe5658b566ced1cb0356d46c7e89678d0c0e111. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZTB42277790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8235d8a8f3f6a66e5b354bc08b551ce4a47b62feb2ebea05277d67f2dfe4e058. 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/QZFYZ2309956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fbd0b8a253b58dee3d9ba76f8169883710829896648bb43b34602bdf541b75. 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/QZFZ72381297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afd479e606902b26d8240f381aff0f38283c1a0034118eb5352cf153cc04ea4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:08:19Z), 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/UKW3Z2302394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ec3d418b4359a990448c41fd1ddfb21e8a114e96789e1d04276e1b5fa65767. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKW3Z2400781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffa7398800db3a11a7d01128cba6dcb94585644b0af45c74694da75e59168ff. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:00:36Z), 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/UKW3Z2402305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3866c8b705925da31607206861cc171bb3401d8a5770a43a571c93bc0e104cd2. 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/UKW3Z2402306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7ad445fba21e2b692aae28b5c0bfb6d526b6860109f9904aba062887e354e6. 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/UKW3Z2402856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f265fb3b03219b0c2408742dfe9e4b6ad08e2c900d98c8665edd64c46ee6218. 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/UKW3Z2403369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13102336bd13255fffc2614c1782ec2340113f0c2c5621af24f70bf04edd83f6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKW3Z2500319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f636c1c8e63373225718cb43a5f78d9116fbda010884eb14db71f022d8548a9. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/UKW3Z2501014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92573c6d096b3e87c80e1e7a870aa1d08cbe53cc08293dd06bc6c2d7d976614. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UKW3Z2501015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb674c04b3a9b775f21d739444edde0c29bf02e50fcada656566b75a1ad3072af. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:37:31Z), 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/UKW3Z2501016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ae88a9b32eaff33d3bdf53ad6cf9e7a10289c9b4d020ed14eebebba43113e3. 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/UKW3Z2500453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7605887f17c9bd56447bb512ef93b21371a08afab00666848786a0539a5d7607. 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/UKW3Z2501018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6784c650d070a4f4b786bb76bf3789b527c0f455010347b35510a373ee4c47b4. 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/UKW3Z2501019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c8ca21218b9c897a025b6ba10edea252bb4c9cfa937fb58591a556024ad338. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TCAJY2589785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7553f3e84e8dffaf1cf765c3597bb896a2d652b240695855bb2070e9f4760977. 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/QZS7J2539124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ab70bafdeb42bff3b832bf399075615b4d7ddc2cdd6803acab2f6d377e782f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN72335471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca4bba5a69fb32a6e1d8566fdd444d979118f95e7346115cb60c6f50e0c58c3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAT2247129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf73731b1231df192dd873fb4789a7d8163c45ab0a9ce9db689d680db923ed6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZS7J2477408.