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 0x168bc9170ae7a2b055b544090faf156d3065581da65249878039effe207c322f. 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/156f993a-eb24-4146-835e-8d584f8dc82e.json and https://artists.proofprofile.net/proofs/artist/156f993a-eb24-4146-835e-8d584f8dc82e.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 0xcfa80965e4192c368056fddd4f85c52e99fb89bda02529ad4f0c0232414764ca. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:30:16Z), 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/RUB421303225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9837fc57fec7e603e86fdbccd160150271569b1469a4f25bc31fc0915bf89e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/RUB421401046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf690c1bb7839611d74f42eb12aa7d1edbb14bb547dad1d52aadc93fb74a7dbef. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:18:02Z), 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/RUB421401051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4660cc036ee2a4df16f0d948f8b91a005b94c7c9d2d0988d6209d9dccaa7ab73. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/RUB421401052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738960c749e9b512815bf6c08a0a0ef13c444a650294533f53ea53fd348e401e. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/RUB421401055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aa5e6b79910832c0a05bafe6f98aaedbaf653cc4bba4f2133fcfe2e4b64e43. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:29:20Z), 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/RUB421401056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46221e23a791cff0ea3df35677f524d8e973b0a3a5911fb302ca580e80280746. 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/RUB421401061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bd0db1b40e2ef5a8f398beecbc3b6c7aed68e36b756b01a4e45bb2e9eec04c. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/RUB421700413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67baf85a6cca6e1e10450222472ea74b67603bdb959705578c7a7459c57d42b5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:08:56Z), 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/RUB421501581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1708e428eb67ae97a1e4ffbca548405ff889baef6556be5441b9ca34bee683. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/RUB421801545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91b3bbf9d5457892c253a87f971b6c2c3593a85f09ba5d51d09f82f60b3bb8c. 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/RUB421901563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de0757d3df70a2bc296238955052716b7373c5007b11e491f3ac02aae418168. 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/RUB422103190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e164c9f5e3db26e03f2978eb59b4a1f4b4a56f500876a30c14b5c7af4a4097. 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/RUB422101038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ac996b5a5209579011268bfbbaf42e6c95d6bf3f616a8efc476228b0a02ab2. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/RUB422502064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b60f64a45a5dfd05e4f1e5eef462a4e20ead86cc68ada273674f4f81f8bb11. 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/RUB422504221.