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 0x240e51591be592b622552c4e23e892780583f21a181c1a0f306e2068fdd18592. 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/8841b7cb-622d-4473-a86d-feb3a1ed14e6.json and https://artists.proofprofile.net/proofs/artist/8841b7cb-622d-4473-a86d-feb3a1ed14e6.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 0x740b7757bc58b0f833e0650cdad185a012915d335fb68bebe7ea99685ba26314. 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/USCGJ0905406.
A Jolly Sailor's True Description Of A Man Of War
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc263140822d027c55769ae279e9ed5d24170ca3d87d144ff833d46ec9cea8871. 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/USCGJ0905407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7a17c5153282f6d376eab1097507159bc4f5dfab90b984cbb38b01fddeb394. 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/USCGJ0905408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bafe4d01ab72877ac10fa36db67bf88f539fcfe50b44efb09c156368897a9e. 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/USCGJ0905409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2656dd16638f4b256111c2cca365a0474d8dad24b31e3c638f3fbb0b0ceea5. 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/USCGJ0905410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6f50e0e3100647111dcc81e345041d81b0a01b0b7e7ad7be2e0bd03820e7b4. 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/USCGJ0905411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55c62686d82da7dce2328df628273b712bd11d3c270f044cc0103b468e42c49. 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/USCGJ0905412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5fd0580c03774e2a80e33b176008ae41ee8666b998cc11b213416090dc6ecb. 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/USCGJ0905413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07555523707fe66084b3dbc341658177c381324dbf0ff601d4b8af04dbeae87. 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/USCGJ0905414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8ddb8dfa8fe725e87821f9926cd98955bdf3527bde166ff6c454da31764bf1. 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/USCGJ0905415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c106a41de0d648dc0fd220a07090e5a595e6b937d252669454ed8585bf3c92. 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/USCGJ0905416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2de4f97b7d054b259751e180c335964130ea6b3cce277f11fc207f5b10acba. 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/USCGJ0905417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e92eb26daabb23a68f3bc052233aa8b2aa7c6adebdc036acabc69fe7285022. 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/USCGJ0905418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebefc7ada6a16e88da3a15263380d2850a4ab3365fff77ba32fc9ffed2e2ef36. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:43:15Z), 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/USCGJ0905419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed3a1635fde37466f027646199504654fc07f04b8d1b5749fb8387075e7c6b6. 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/USCGJ0905423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa453fea3a9471dbe06b1c6b3e863adf286d59c9461cafdc68590ac4523643ee. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USCGJ0905422.
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 0x5303df0c07a933aaf0e2b667cb65ebe36c72ed6fcde1d580f9b1a628f1b841c3. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USCGJ0905420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2008e7f2a3062e853770a43635cc8141766f89e9f42dad111bd108aed49ca22f. 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/USCGJ0905421.
Captain Barton's Distress On The Lichfield
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d5b4acd65e5ba1bcc36524833b9c0c6bef3d933f8e78dc5de5261de885eeea. 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/USCGJ0905424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e06f84588da46555bad3af0f09dee18b4c6c5998d54e5fe9f871de082f0fc39. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USCGJ0905425.