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 0x8edaa97c694a5b4f8727732cb4367a4afc238b3075b94765ca339965456118c2. 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/a03c3f01-1e05-42c4-a1f1-e990a7518636.json and https://artists.proofprofile.net/proofs/artist/a03c3f01-1e05-42c4-a1f1-e990a7518636.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 0x0b4c0ac264f30696fd81423f1eff1afa954de657f1716400cfe33fad4ba90d2e. 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/FR59R2204088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4c0ac264f30696fd81423f1eff1afa954de657f1716400cfe33fad4ba90d2e. 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/FR59R2204088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1787f54c397677315a08781628317389ee47804c2941e8ea08bc5b237c89fac. 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/CH7811930416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7591a8d1cf737a9ac0c247cd5831d41c059d7569425cf45ac984423608bebb9. 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/CH7812235889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6441eb8021eac67c2d89f4ae7e53f4af6ad625e339e77e0dab661103495ff17b. 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/CH7812235891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb340c497d22b0482062ebbdcad1100f0ab4af672b82fa49e54a6012aa1de97. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7812235897.
Stich, Stich, Stärbegrüsch (feat. Greis, Roumee & Dj Rapaze)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ce5197616335f2633e86599e583bbb7e712d0f45657d0daa0967d6d78772c7. 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/CH7811816381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cbe14d3dd257d924f480e74afb823322da754e379bc325bf6ce699321a01be. 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/CH7811816382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfe4640a10c2f81e1b92af5939ba05487e9bdbbb1ecd47531f9cec15d289620. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRX202289332.
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 0xca8633f458cadb5872931284c59fcd971e528644ec7aa2130463b3e0f4105e15. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRX762296872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac3bdee7d10fee3bcdd853636fdc3c8fb36b7f66e662058ee9747d375e2ccdf. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CH7812235886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a11f2c5aa0ae10a79bf8af17aab54bd5b1a1498c44cb705ffd4ff6a0bd58f03. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CH7812235887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561d0bc6b5004cd5acf0add1a5fec05f22b20f022599abe460394ead9007ee90. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CH7812235888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8796cb97c6e5d33ecf53b3b63078365d8b78e8332ed566e67d49d26879394a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CH7812235890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1850a6063c261a12339e165093df3a7cbb462b772f2c6f08fcc43f9ea3c2a4b6. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/CH7812235892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb84c7ab79a82cf91df5f974f4e9be352144fdc703a3b7503402a0c4b34d1195. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/CH7812235893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e57b2f390bd41eb9fc55f04620e8e6bba7fd6edb53fd499f4f608ac38dbed51. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/CH7812235894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3e93c66ac0cc836fe8c886bd8f7d0e34a5ac62c0a9e366bed9f0a007d6a4b1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CH7812235895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ac00bdd4090d7a786e1dd152706f3ab66d9f2f24b0742ee289205b595a8e5e. 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/CH7812235896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3aa3bdef60043f025b756b34f2078047450b972882dbef28f0261df38de70d6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CH7811816380.