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 0xf2118693fb6463d5f7a0b3e0d8c4e38a3b1449f6c23885d8ff8506a92b1699ea. 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/cfab54ec-68d5-4b65-92c7-a7669bfc0fe6.json and https://artists.proofprofile.net/proofs/artist/cfab54ec-68d5-4b65-92c7-a7669bfc0fe6.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 0xd69c08c7a0942bbbe1b07b902e7f4b3f2f2c5bc2ba4ee0e28dff51405e8482eb. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:01:22Z), 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/USHM80740535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d78eae12367ca8e638bcc2a06d94361c0b08df33448211198c532bb9d82e464. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USHM80740536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575e86444014338b55d4336d4c4587fd4e31a55ccd52e854d00c4ebe52f7c820. 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/USHM21723035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1a04703b901b911362a287189b181623240f5ef66473169e20ff2c802790f9. 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/USHM21723036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda172241061e0f0672e5fbf5b3421fc129a66a9bdec781636fca1cffd16b33c1. 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/USHM21723037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c791fff78d7fe4d6135e4627fbc1b5d5ed667e3dbf230e0f87b299cc7d882a1. 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/USHM21723038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c8078190fbfc675fd4d68d4561eda8091e4bba9f7e46998fcfc93dfd345d2a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM21723039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a294e1509e438405ffea701fbf80af903455711bbc40953472c7af9808e194e. 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/USHM21723042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7bba587971d46bd937ad5266a169df0d9900fa910e051e4df64fa795ce8204. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM21723043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13da95b3cc3c837bd4c8022262bfb654a91bad49655ac462ccabb1c072194fe4. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USHM21723040.
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 0xaeca938e70597c4a7160f8b70cd9f387009c6c10ed547e4203472cfb2ea54d5d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHM21723041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb0cea080ce072de6551f383324a8c3dd535b467e929a95a56c02d78ffef65b. 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/USHM21723044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfb85ebee5eccbf56dda57e4c3876c63aa2dd0e8c46ec219f01e1e9a44b9897. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:04:46Z), 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/TCADK1781780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236955f32218e731af1bfdbcc019045a2b79e67e3e9498367a1fc8d51ac2393d. 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/QMEU32014309.
There's Always Tomorrow (Extended Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46189d47ce889d2ac184a038e94b6231ce7b2defb97bfb6ce1b96a147070bd11. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QMEU32411335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f00158e507c9165704c303a9af19d7143a31fd0e487d013d72895c041320686. 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/US7SF2056921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05898431161530c12293e2e5a4c98bcee10ae78c6e1c9b4f07bf53d920bcd9fc. 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/QZ5FN2137733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7306118749696b10b7fa0000998d73ee0f6abd9c772527261d034150b18e06d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USLZJ1987140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee5eacec18df135d2f47fd9e7bfd8f470427a35b9aa153a0c00ff015cf96c1e. 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/USCGJ2062862.