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 0x41224e3fac2684dfdc50741a57915027da163ec037e7f650c493866d8c894c0e. 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/0013525d-7498-4237-a0a5-f6f7e87f26b7.json and https://artists.proofprofile.net/proofs/artist/0013525d-7498-4237-a0a5-f6f7e87f26b7.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 0xefb9acda8d9a386a0b648f0c95d46de6a12e0106a605e216af1dd05cf1d20777. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USZ4V1500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb9acda8d9a386a0b648f0c95d46de6a12e0106a605e216af1dd05cf1d20777. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USZ4V1500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169832172c8bc97e5212d957e3e12e95fa85b2096162dbcb7b6c9b5097df4233. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USZ4V1500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169832172c8bc97e5212d957e3e12e95fa85b2096162dbcb7b6c9b5097df4233. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USZ4V1500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72589ff8a0679f514b99dc30cddc304479537b966a79595588a8e1a2b2e4da8d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USZ4V1500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12721535172b30a3fad34f705e10c5130fe41654ba108b9304b2ca9029de948. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/USZ4V1500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb9acda8d9a386a0b648f0c95d46de6a12e0106a605e216af1dd05cf1d20777. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/USZ4V1500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105d72ed21b1ccdeb5ed85748d0928b8ec3d0d077cc9f0e2b0139d0c671ab76f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/US4GZ1704802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115614226b32098d9130950755730b24cdb08d2650fd470f15a25d02bd57d658. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US4GZ1704805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09813dc48cf3846cb8105fdb9066aaad6a143422754f669c7e567ba1a62b442e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/US4GZ1704806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c74d0f5cb01f4e88f508f255ff5f14e109700e19ee2359658260820425f0858. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/US4GZ1704807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9310a6907cf444904822266d99025d6dc937d61acab9f7278597bee197f36b08. 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/US4GZ1704809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72589ff8a0679f514b99dc30cddc304479537b966a79595588a8e1a2b2e4da8d. 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/USZ4V1500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12721535172b30a3fad34f705e10c5130fe41654ba108b9304b2ca9029de948. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USZ4V1500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fe48c38b1a2b91e59f0eaa83f1d78a4265f16e1fd8883dc9fbd64887c778d6. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/US4GZ2207109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53104306c1276a5c17410c20ec320b71c9a2aa4dd788a26a1cdc8eb66134c812. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US4GZ1604203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61040c26cfc2c941abd384f726c4695c4c3c4d8be46a97bb10458455df6435dc. 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/US4GZ1604207.
Daptone Records Singles Collection: Volume 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3691b778b0c27f89c195f80782631cec84b27930ef61dfdd4a0035f324e090. 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/QM4TX1561458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd1227d6d5301d0310ba7bccde606699ae31e578e86413c375298578a2337db. 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/QM6N21987067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3691b778b0c27f89c195f80782631cec84b27930ef61dfdd4a0035f324e090. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QM4TX1561458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc4b3a559846bd0d2dd707e56e8301c3f685f8afe80143af8bb0505df76d748. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/US4GZ1704808.