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 0x7f95ce12915f4cb058ae645280393518ce45f8a483873f768befd5f4155e06b4. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f906c163-3306-4e85-b3ba-88559e36085f.json and https://artists.proofprofile.net/proofs/artist/f906c163-3306-4e85-b3ba-88559e36085f.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 0x5685a2600e808094946263b44c21e81c2e0fbdb7e3bb6740ea40058737322313. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/RUB421202585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e27870103de050fad238e897a854452f7c82eb4f5d612e2b6ff9603b0bd83b8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/RUB421202643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1582fc01df2feead3f6d879cf1eb414c72f3ab5bdb778acda1772c524082b082. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/RUB421202605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeff79e84338fa28f29ef248862d5f907875610cf45e986b24d946607f5a6b29. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/RUB421202601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18d0f216ea54ab9a1f1d4dc6f882fce7eb02d2e3156ab6d14fbc7b6f98323d7. 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/RUB421202484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768ce04ceee9f31df33e0b33dce16d974ca1a9761b471fe9cc1ba25a4fca0f53. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/RUB421202479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd000255e67d32013f30575ae0cf87669fbe0948e54107bf8ccddd58678d00b93. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/RUB421202466.
Blues de Moscou (Часть 2, ДК Московоречье)
Blues de Moscou (Часть 3, 2ой Часовой Завод)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8141bd6b9ec31d4edf5145c6e945c3c0b359234a43d37e23edc25134ebff384. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/RUB421202467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3239e554c7a86bdf92868d502f692c758b2f71e31c7de3808ce57d2c542eec3e. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/RUB421800458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb751f1ab13dcf9d1a3b8178fc9cd9f3042efb6b6f27d04e7b946768326296314. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:43:41Z), 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/RUB421202465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44751f57e47f818e94e47b47e0402e0dc316b74aa4050bba2e4bf9d9e19969c2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/RUB421401366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab995d3362e00b1b7e3472ea5fb16174d498051dcbf59186591d58e6a9997f1b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/RUB421800454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768ce04ceee9f31df33e0b33dce16d974ca1a9761b471fe9cc1ba25a4fca0f53. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:56:02Z), 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/RUB421202479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff57480673b5cf03106be41b85756f5c3dc390c841a61960d40c5ef997a8c2e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUB421800468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92159b999c9679f3a336058b045b0d9b8f1086fb348af7edda0e09340d71a320. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:55:02Z), 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/RUB421401327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e800de3d871273a63f769f07e474e30bdf5098c1cbf09a09b711b8e61c1413. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:20:41Z), 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/RUB421500199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b06013b10dac9f696cb801eec09591afb239010c258ce60d4dba630e09715fd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/RUB421500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2eb693b8aa90c38517ed60ae0eb58cca1726f0634d5fadf1eff46ea3926ca9. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/RUB421401388.