thumb|King Edgar seated between St. Æthelwold, Bishop of Winchester, and St. Dunstan, Archbishop of Canterbury. From an eleventh-century manuscript of the Regularis Concordia. British Library MS Cotto
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 0xa18f27b5af7231861e1e82d2ef4c7eedd38e957ad3c438657bdca48e27ddc01a. 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/7e6fd9d4-cf61-48c6-bf47-a15cf09f706e.json and https://artists.proofprofile.net/proofs/artist/7e6fd9d4-cf61-48c6-bf47-a15cf09f706e.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 0x68f75b6bc258514d973e9b95b7861af1aa741a0f2698b77148c4ce7c99ab1867. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/RUB731557761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c0206b7ccc79bbeafb1095e791635286d8680633b5e271077c0323c3043e1a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/RUB731551631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f343ebb0602b1be1a39d1101719f4f96f32ebd76a155a48def4ccf341960479. 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/RUB732049111.
Я больше не люблю тебя (Misha Plein & So Green Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b900afc6a9c758fd990e77d0780a81c1e377173bbda0ba572db4c521b17dbd. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/RUB731588502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69883ff40e397f5bed5493a6db52e95a180fe294dc180c9fdc77321af5e040d. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/RUB732010725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0dd74c829cb129293c0c8adbfb48c41b9ac2de4a37fe8ab71cc7e835ac55a8. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/RUB732014876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c86d68a3eeff7571436edce7069e7e94b0274e14b04e94ed50c7f2aa3c2685. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/RUB732021171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5190c3ec791f677a2258636dbb6e6e11a84f5c456a9085177c49e24b4afbf581. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/RUB732032090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67a7939eb6bf048695b3e12246c49c491edcf63ba3f256ab92a783ea4721444. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUB732031321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0268e3a7adaedd01152967d290642ef4008623f7b645fd2719724acfd4f2dff. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/RUB732047675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f343ebb0602b1be1a39d1101719f4f96f32ebd76a155a48def4ccf341960479. 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/RUB732049111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0086f1b8e1df9f38a1e79dee6fd0199dc5036a51cf46e0f4169324de34afc4. 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/RUB732061727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fcbd6ad5693ab8021609fd3f20828f1aa6be2a69b32a851cf965a0d19bd89a. 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/RUB732070264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c35a6ca0828543c37d0fb320cc0395e7b81044ab470d90fc010d695a92a5df. 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/RUB732073948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d37ef1db0770e952ebed5bc6003f595233b31b1887d9828c18c88d6cb5c9355. 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/RUB732077995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0086f1b8e1df9f38a1e79dee6fd0199dc5036a51cf46e0f4169324de34afc4. 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/RUB732061727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fcbd6ad5693ab8021609fd3f20828f1aa6be2a69b32a851cf965a0d19bd89a. 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/RUB732070264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50084d5c32f9236b2db39aa98875451c1307cee84e4484baadd17c592fa1cc29. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/RUAGT2569044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11040c0ceb446f015647145cc5f17c9b6ff12f8b4f8e2cdd6e14b025a9798c47. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/RUAH62516630.