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 0x07989472e65ab2863593647d4253ab56ca8a1f1a47ce8877c95a31dce3b2540c. 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/08e47502-1467-428a-8d2f-bdc5ac6a1a51.json and https://artists.proofprofile.net/proofs/artist/08e47502-1467-428a-8d2f-bdc5ac6a1a51.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 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 0x779c18442c35eff1351e291b565e28fcaf7bf9b07b9873129cc6f28fba5f25aa. 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/ES71G2415531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c79a70d180b7a876d7c56255dea540e4edf9a5d881ed6cb7f82777290a1864d. 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/ES71G2405956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4697e63ffbed172d9493a39497b058ae70e9b52dd86f410ad3c0bd61e7dc23b9. 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/QMANG2467849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae77f57acae7db8e778e4623a1e2a7ec4985eaecbb2878b8d37e006d9661e083. 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/QMANG2270553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d08d48704b05c47cdfb45cbdfa157d2547b320282026a9c673d1d0169ac75fe. 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/QMANG2254383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b64f95f1b581cab9de85ae004b86b3da3c118588e7f6e58e1ce929dcc6d24e3. 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/QM3DF2280350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b80f29f5e9da6255d9f8027cd4894dfdff4481fb85a86b5c0db9cacc3d5a4d. 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/QMANG2298140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b40d5eb8af9034b8b0ec436c4b7fc18fac5bcb55bfb1d768b25092ba8bc7db5. 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/QMANG2278745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa763eb72d0e66585726d2a8d26c0210a6869f0cb693e1687bebd2a8abe1666. 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/QMANG2238469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2289fddad492c6a986fab2c5bf8ee8f67c19118f257e59eccbcc869f9ee0c60. 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/QZTVM2226025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66df3c76bfba52dff4d6a9944bde416452ed46f40319bb9d95f2b253028753a. 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/QZNJW2145939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566e733531486930fdc89aea383bdee8676744232dcd4a9aff92c95edab2e24f. 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/QZNJZ2196390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14f1917464fd1b6e617629b18a9dedeb28c5c85de2e497cd67f279a894e067e. 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/US7VG2247020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21352d03c5022743b2feba9a439926f140a03b8c75fd86f9b85f221cd1ce849. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZHZ42245296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa238d72e148799334c6df2130d9b13961ea99ac7f6391cf95f0b5c2c564310. 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/QZNJW2245122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa238d72e148799334c6df2130d9b13961ea99ac7f6391cf95f0b5c2c564310. 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/QZNJW2245122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e011b8b6b7e16f29a466b70c9500a9582996db758c8c033e2969abe204d7d4e. 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/QZGLM2287806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14f1917464fd1b6e617629b18a9dedeb28c5c85de2e497cd67f279a894e067e. 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/US7VG2247020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566e733531486930fdc89aea383bdee8676744232dcd4a9aff92c95edab2e24f. 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/QZNJZ2196390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0c55c076fc48dcc310a3ebc631035d8e159fd949c4992ac8e6d1fd349f573c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZNJY2165882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66df3c76bfba52dff4d6a9944bde416452ed46f40319bb9d95f2b253028753a. 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/QZNJW2145939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee92d09e2c3e471fa90982efe7cb7ce9662cc7208a6d1a4ef62c1616070dbc1d. 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/QZMZ92177982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f03449f965f27fe9e8c5a91ee419da35141ba6e430701bcb888346bc8d4fa0. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USANG2159607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efd683f5fa9586f67b446c18b83450aba2a53931227a7aabd1f2b08c171092b. 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/USANG2174008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5963346a77e11178bce3b76dd0948a41dea8c986da77666a9adee1e5de9fcf. 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/QZMHL2071238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63e03af11b9beb1856f0ec6cf245f678aafe61fc1d09ee996a02aa82e0683dc. 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/QZKDK2007164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4521a504d64c5aede047c7c151d27bb8c370dd88b225455e735f22e948e7cd5b. 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/QM42K2061212.