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 0x5f2e4ea9375d412c76cf3ac408ebf33f23c32edd03391029a586035d20f68c86. 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/4fabd7a0-97a9-48c8-9762-06b62ad3dc4b.json and https://artists.proofprofile.net/proofs/artist/4fabd7a0-97a9-48c8-9762-06b62ad3dc4b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Everybody Falls in the Summer (Radio Edit)
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 0xf1c001d7aa605dcbc45237ca25f0eab948d8f4aec7564ccbd124987b4e85ab2e. 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/USL4Q1871353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2dc24ac9f59d09bb89f0a0e44d7c4694542ddd4577be71cae1fd9d528461a5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4Q1805716.
I'm Glad You Made It This Far (Instrumentals)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf546d172f312f9a92bf67d8379060ada0c6dcf2e5f2ec380683666e4c8b400a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ZA56E2100841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4939a88c9f74592d1b049850be56b3a1087fd3fe9f94cfe6969e3c5a36b466. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ZA56E2100842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300af9849b9c79002c73d37a7a85a0d95cc9f781a7d5b41f51f4e5e45896a3cf. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ZA56E2100843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6173d06177de8af8a8842c8de1d6d0c8a492bd73486783d9565d6d07206e7b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ZA56E2100845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439e0837da6125004a46c875a49c6c8ee35bec153872fe2d4ce1f7c2835e58d9. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ZA56E2100847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336cf151809d07de1f8a38893830e7ea85054252522b4fa766c347b2b4e599f1. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/ZA56E2201463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe451e43563730743ed8e80f5d4d644f5488c9043db444550d42a9c582b419eed. 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/ZA56E2415948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b793b0b27fe5abe3c5138a67cde73f25167d788a07a32519c304ff354e5cc2. 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/ZA56E2416143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a04a41994888cb4c163b118d93b7e3e3385eb8026d65c4903a1f30655edb10. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ2GW1800400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffadb05f72a0363967b091885fe0b1b4d830ba96121ef0b8b484fa151edbcbb6. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/ESA011955240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc846be4dc595d575438cab38d8ed233d9e40ae4fab3755d35cfe03f10e31a03b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZSYP2246094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e00c8af7e4eac57fde58dbb4b69e966ff7a6b706f87376446c8ff5ae03927a4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKWA62000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e00c8af7e4eac57fde58dbb4b69e966ff7a6b706f87376446c8ff5ae03927a4. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/UKWA62000004.