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 0x63453795d6492c7c776af12f62a30572c339f7923f129df1163c8220a576afe0. 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/2b57e588-98e8-4378-a1d9-b454a96522dd.json and https://artists.proofprofile.net/proofs/artist/2b57e588-98e8-4378-a1d9-b454a96522dd.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 0x39fc008bce3fea8a12d8c194969d27141ea2e185a9c5e93f58c797d694879246. 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/ZZOPM2003521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ac347aeae92c85909f870be0a43d20f932d209248d546fbde4a5c8f8fbb9d2. 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/CA5KR1953667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b5ba10086ae5adf35e30f1de21aae41da4e6737e72f67d9ae845986d698dc1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR1953668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb4d6758adae2378cc1c1f26080537a47a08ea92f1b0dd980b8fa42166a8bbb. 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/CA5KR1953670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc954890eb643b7d23451b6eefe3912d235788b5f17300c8d791007f4b377ba. 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/CA5KR1953671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff7bfbc23ec0a52083002a7d2883e41853a37d931be93d35f8bf490059ea97c. 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/CA5KR1953672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797fafc93d3fa428d2f4a5ac9a63ecba84f5c8fbe64f2344ea0135dfd96ac179. 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/CA5KR1953673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8e45c230e8de8c25e5824c7e80c7b6dc3440a63b00112a8377c2ce287c5b07. 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/CA5KR1953674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8441ff8667c3d9f19a2914faab5e2c603da6fc142306bfe4a7094c3df7660375. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR1953675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d86c060dcb815cdd153b9b309c9966798428ecf83dc023e9d736180bd113e84. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR1953676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c965104d017ecb1efae6b1bbfdb972c263caf72984b54667749d2064c6bb6ff. 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/CA5KR1953677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896f2e708a773802a85a4c5d20d67b04a1f1f084003cddd2fbb61a58e37ff2a8. 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/CA5KR1953678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db622db27b748b95f8ef45c30b5e4fbebe70c01476445a6e561216dc3bcce67. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR1953679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765057b5afff840e434cb932be6c293674aa93b944262d5c7b223cddc05299c3. 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/CA5KR1953680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652607932532293de06f3d6ae43a90c5905435cb68e3f9ac8068fa816368b403. 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/CA5KR1953681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41401a43b2aea2dd1297a760ef0fa0ff6018dc2bf9c36120cf061acaf42a80a. 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/CA5KR1953682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50d89eede9ecce2521838967e6f8344a2adb53f5c00c36ec2c59901ca3c345a. 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/QZFZ41968092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcf7020f9c8665fd4894de0824cf64d0362b3709e592fb4ec0db1b389499ebd. 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/TCAEM1911523.