Gravesend is a town in northwest Kent, England, situated 21 miles (35 km) east-southeast of Charing Cross (central London) on the south bank of the River Thames, opposite Tilbury in Essex. Located in
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 0xbf1e9fd0e9520631d8e4cbea54fd8c440c00f85fe44554103b50de5c7f9c868a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb7e255a-6ccd-4fc4-bc55-ee5d6127c397.json and https://artists.proofprofile.net/proofs/artist/eb7e255a-6ccd-4fc4-bc55-ee5d6127c397.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 0x47ac420038d66608f651c01485716c85cb4645984136a31bdf7f5c809d9a516c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZHN52080683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afd9ca98541891cc732e5a9a190dc9f4733c3bb3a76c635cc9a769ca696d584. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZHN52080685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66c8e06d95cf0dc5257272730bcfb7766b58d0697702233b70791216f6abef4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN52080688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da0c854b04d345dd474c92f6679afede95c50771d1370f65b13d0bff994d58c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USJE72114202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdbe442636d2093f31c95ebfc10e7d12e4a65fc2c371a6313a1cfc53a7c0648. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USJE72114203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47904bc40b70db4a6a9b3a3a6fbce3f1f07ac3621879788d569d7fdf8c6fe8da. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USJE72114204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2c941406b0a6f240a4daab02f8f1bce0e62a9023c33464882f967cd589c817. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USJE72114205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47904bc40b70db4a6a9b3a3a6fbce3f1f07ac3621879788d569d7fdf8c6fe8da. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USJE72114204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2c941406b0a6f240a4daab02f8f1bce0e62a9023c33464882f967cd589c817. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USJE72114205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baf0d2c69adb0044ba744b7108ce1e41ed8e194f92ea01fdfbf178462941b87. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USJE72319302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ab6ef6d7329a036c00b4e321babc80849f9ff203c8cb9eff1ca4635d8edf4b. 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/USJE72319303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9208eca6ab846a67db4d2160f045a48d863099e85c1d437d8567e5ffbf3b9cc3. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USJE72319304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e105a50175eebbac9a3f6d14d3dda1e4faf67862af150fe54bb5880930212e6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USJE72319306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baf0d2c69adb0044ba744b7108ce1e41ed8e194f92ea01fdfbf178462941b87. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/USJE72319302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ab6ef6d7329a036c00b4e321babc80849f9ff203c8cb9eff1ca4635d8edf4b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USJE72319303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9208eca6ab846a67db4d2160f045a48d863099e85c1d437d8567e5ffbf3b9cc3. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USJE72319304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e105a50175eebbac9a3f6d14d3dda1e4faf67862af150fe54bb5880930212e6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USJE72319306.