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 0x877c601549ee6604f9d38d7196605d5a495eb67f8bdc31eb3712e09ee1646714. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2b0bd14-65dc-49e9-a7f7-39341aa0a7f0.json and https://artists.proofprofile.net/proofs/artist/e2b0bd14-65dc-49e9-a7f7-39341aa0a7f0.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 0x7ce1c56b1a23bde1b13e4373f08d53f649fd5da98fbf0d94f86cb452942df466. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ES39A9650014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67bc7892e7270764a445167b14a3730ca49f7b5677de3779fcce0e1a93605c8. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ES39A9650016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b846f354f09f92d3627a67424be5ae2cd505d36e0180da8a3b5d5d2f6d1285. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES39A9650025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba6bb445f71e0acbcedc618c851f078f9ae0471bc5f0ca9e07a712bc3e33964. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:55:29Z), 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/ES39A9850031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1582d17892bc4a2edf747afaef1c7914c8507f824d02e7b631fcafeab02196. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:24:39Z), 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/ES39A9850035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e66dea42216ba1feea57ad4be966f665ce1c7a1dc23f402c318441155c58e45. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:39:01Z), 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/ES39A9850045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84e5137f6e0d20ba8d0d31aa251ebada17c8e658f74a9e950a0960b66d2f46d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:45:29Z), 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/ES39A0250085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07626b79435e1d138a4ee8c1a0109f1f39d35ed1dbcb3fce1c7490c32b396adc. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:34:12Z), 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/ES39A0250089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9ca75e96000c14a92f4bd2015c4bee63a031ccb4cfb7739e3da024497658d5. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/ES39A0250091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75daeb4883bfd64771ceb14e9edb927ec0e7053ade724cfd0a7c305fab031e6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES39A0250096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2621e4ee49040e2eeddd7a550209e4ef95ee1edeaba59ff0cb9fc982f83992. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES39A1450116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39b9f211344faa10e152fca61486564d61c373a0bf77016006844f72441100d. 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/ES39A1450119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574951fa69c6b5b99379bcac32d64c889fcf39e001542dd4c04885451db116cf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES39A1450120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca3b7c6e0a27afee200a061cbfba86de3b44e099064d39cdfbe75f513f0badb. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES39A1450117.
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 0xda990af59d6545c0adaf6ae969213412e993364c521c8f785fe9e191e1567caa. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ES39A1450121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3646524e114581b0cb41ceea77de0e1fbc92c4456ccbc41624d037a4214c7645. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ES39A1450122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef54e84bf399d32c72834c99b8e5c5732c568c36f38a60cd23e7e9190eaf25b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ES39A1450126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47d3f8a872f201ee66020a5d3e3a05562387ce49345ffdebc77d76186abb3fa. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES39A1450128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d2eab93ffa20557e7c3b2a7cb58fad96c3102e5c395c456c275fea04c495f0. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ES39A1450129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2bd0a2c10c198e4d02c899a9325bbbd3a0c81e1cd784cde54a6e7c55cfd148. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES39A1450131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbfbbc9146da28c35975bf7fb4c1c8e2be28b46b301aac59e8965780ac35039. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/ES39A2450132.