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 0xc249128e6f16a3c15e35c583b93e7506076aafb7322ced84d579e3bfa0edb42b. 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/bba07da5-7df9-4611-834f-3009e3ed9f37.json and https://artists.proofprofile.net/proofs/artist/bba07da5-7df9-4611-834f-3009e3ed9f37.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 0xa9409aace473d7050de438681a2a03d3e2b74c8b9a1b76b592ec4c61aeffeae7. 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/ESA012259370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397d24317435e5722a630a4bf726103287a73529b14b78fafeaea9c629b15982. 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/ES75E2200831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff05652c7fa3670ef0fe3f202aada86d53d5732dfa7b82b1064116fcd4bd106. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES75E2301926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187f56926ba60ec2749a6bb73cc48b9d29409f08c3e453e74e2cee760351f72e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES75E2301965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1a14353c0abfa7a474f2d70768afaebff9f205f2fae8134a1dcfaa1dbf28c2. 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/ES75E2301967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc3915e513e6853de24010cade144882f9f97b0a76c9a0efb59de9ce25b5985. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ES75E2301970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b89d811fc21f340e20f90256adafac84c80245f840d19ad67dfc186b1fcdd2f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES75E2301973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59424ce3cd957dfda4c5b94fba19209799358b1fffebab4263beaf933aac5f3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES75E2301974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c8825ff8a9c44901d9038960ce60a22da493ac6b17a0a88d0ec30e060ad36c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES75E2301966.
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 0x528447d50d1f04e5972038b27b710071176899eb5ade6d07241017254f240e77. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/ES75E2301968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c61e263ab13c3e092f310c7f884c1a4f9d7245fb18cba10c94c3cfcea89e0f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ES75E2301969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d7f497b66efc5319532cd2d59610020418528b1965548ad977c1b39182035a. 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/ES75E2301971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ebf1108a7114f3c0932db4b6b7f65719d94bf98cc396ff2846b516cac31753. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/ES75E2301972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80751b7c3cff38920de63c7525b7e531fc189aadc8978958d7b5a2aec905d13b. 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/QZNJX2237887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ea0520c82ae5648e2fb7915d7a2559be5dca10fd19c970f41ba35bcc12628f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2120201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b85ea57ec2b4c0161f7a3ff72c7efb150c4be6c92739fa119ba56d0dcc4d25e. 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/QZK6F2152399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74066213b830a8c0d25e16c723816990cd3055c1b2349f4397bae1b6ed010ec2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ42064183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d32ae424df86f257f9c4e1cc8a32d977ffc85773b20c301d5030081aaf0cee8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BK4DA2307941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff307fc6822460a8aebf7fbaf8e0cd1fe445eb619b5674d647c553f919c6b7f9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BK4DA2307946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec50eb7dcdb02db0773581a3de7ccc6bb01a8972210314b433ac5290eea0191. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2034069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00aafb9fe072b0eba46693b299b6c5008ea3be97ee23839ee517bad30322d75. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES71G2100776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fd11f19f771eb5b6048c33f6b9eda6dd8e939d294c5791d3b075436eceab66. 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/ES71G2100780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65859c90d72340813756172ed4419564c144232e5837d8d8969067ce88ea2c8. 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/ES71G2100781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305a828ea3009c07129c0e91ae4707450f080b0318bced152a9b5a0b278bf1ce. 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/ES75E2400410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72248db1351d1db13f0744f28303f51ce59af9252cf65a5e8f0f81d0633231b5. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QMDA62232214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2f268eb1abb3a2875a79342fac889e45210fa6d32f2345fb6fef0c09daaad8. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QMDA62232211.