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 0x415de8a1181ae8fc2e989eff2b3db735aa3b64390d2d6728ad49d3ab5788fdd3. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3c6d3c1-2cc1-4597-b820-d97ef5f68333.json and https://artists.proofprofile.net/proofs/artist/c3c6d3c1-2cc1-4597-b820-d97ef5f68333.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 0x6aa3a625604a40de48e6f3a96d7cffd23627a44f71fa5792c19650f3607d3fa0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USL4Q2382241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd868d2948b6415692006c8db1bcc92fbea76efe643511528771621bb911c7692. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:44:58Z), 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/USL4Q2303760.
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 0x7b46cc88611bcbad2d12b43be372b6df3c37777b3f4adfe87f5423e7f089b239. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USL4Q2382238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994080da60182afe698fb25ec367cbe707af663f927b4a4df4c3a11a1187d85c. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USL4Q2372611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447cfe60957c355ef6fbb5d0b2e48c54988388271c540d1dce1627d738e0cd8c. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USL4Q2382244.
Kids They Always Knew We'd Stay Together
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8b95f06761f91df90c8bdb07a9d8bb85a8719496b270338e666151ad8d566e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ2018108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a417df50e638fd6ede6daefd926365e3e2208e23d44a43c56139fe048070960. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ2018109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ed4369f13df0a126dc536f70228460c6b39c64b2033b51e073378dfa3b2e7c. 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/USCGJ2018110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69631baf67767e31be29b95ae3dadb110071378117096e4ec25a689fa092451. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGJ2018112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9591447f4afd0a3110f0594054ad9f3deab27825c196c5e096de582e40bb2fe5. 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/USL4Q1725540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f32753dd3dcb0e5c829fef157b833ca2546edec2142c3e792d23b75dc180fe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USL4Q1725541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a2026e948b344d0734d75f0e022bd1d139d08f37d6b6fe661b9ba3c03d5bef. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM91710700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dde8895a42b5fb5e45e4dda0de7b80563a26d8fa0417710ca86f8247a364813. 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/FR9W12430105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb769a3caf2dd288c33919b2304b3ee938860930211f2d1259d922a8700373858. 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/FR9W12430104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd3158b14c22d27391fca4a88ed1a3ed7e1af08e8bb875ce7dd422212cb1833. 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/FR9W12430103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea96dafdfa8cb0c35f356d919d1adc68e8952738e9800a2d4b7476480753078. 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/FR9W12430106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286e5fd8cefa371b12c11d51f22d8aad49d043dce0fae3996a852320ffd55d59. 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/FR9W12430107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62568b9ab44565f3ba4840f29cbbd14972f90f475014b9d7effacad87ce6fa04. 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/FR9W12430108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d2047ae67cbcf4ff49ae753bcb3d5ac417db6bdd4c33dbf6fa670d3a5c1aea. 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/FR9W12430109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a02ed76887d49eb6230681449ed436d0d2cb395abde731350c0c68f0699984e. 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/FR9W12430110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a14dcfd2d1b442a216309f195b578dacbee87d8e9e0d98f5ad581a8ace6c711. 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/FR9W12430112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc441a904f6acdbd3f16066f323bec439c597479e457e9297fd4d3adadbdba7fb. 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/FR9W12432376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd31c19788df9913d0e04a8d42088bdd2a9cae4a15fdbe88eb3acc5b1fabd84. 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/FR9W12430113.