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 0x10d69dec874645984cdc787af509c92b8e7dabc4fc296ec26aeda48480d9c250. 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/4b235253-afc2-4635-9b00-b18bbb84357f.json and https://artists.proofprofile.net/proofs/artist/4b235253-afc2-4635-9b00-b18bbb84357f.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 0xf5e61bcd979f82fcad6ecc008b056b2a4ed5ab9f7562f973a3729c2fd1579ef2. 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/QZES61944635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a5ae821fc9496114234688a3ef9f5ef129ef2c4d94e049b111f86cdd37754b. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:29:39Z), 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/QZES81925135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1659e9830c236a1d1156cd4bc3f6c978834a8758aced88f857a7391e6296d6. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USYBL2100676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9c2d576509dac4090dde3e01cde667ce9f415da7262c31949aa8c42751cc44. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:36:09Z), 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/USYBL2201029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf998a8aa95345b435b34e332f54e2fbc73a605ec35dd8f7b3f6ba59a6b23e5a1. 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/USYBL2201041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cabab75622a53e79919399adafbc5f5c1530c8a6c52ad610bbae63fbbd971d8. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USYBL2300318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0da5c28e45e745923e93df1e874af99078d90c4761b855329222aa83a66f0f5. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USYBL2300840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ddb7f176761dc73d0a4fc56db0da14a9254f51603e65e761e025cf534d6a69. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:06:33Z), 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/USYBL2300841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6254e3e2b71082ee30aeb7237ff3ba6662933d83edff93f780703b7730496d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:19Z), 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/USYBL2301934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810bd151355751edb953196c4323754dd82c998950446f67c760b6137c0b3e8b. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USYBL2301935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf738b63c132e53b43a176f4c620544f17ff8877ff51d43655ce8bed701260b65. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:36:21Z), 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/USYBL2301936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1636800a2ed2adcca09abfaf7fa028cac9a0be1233dad773083d3b77ed6ac580. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USYBL2301937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab9ce144a6eb6ada2496297d2edfd629a683a8b81d887e37c87b293262b5867. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/UKW3Z2401710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e644ea8a8e7d2a4c2c0b9ae1ffccc4260941101df70b8fd2f202dcbf6beee2. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:11:20Z), 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/UKW3Z2401712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af071167438f61b6ec3ba8d1d9907c9bb69c147e41cb75b98baa60cc5775a8d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM7282441306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992ce5230892d14bcbcea3680931a2cb38546c1f81df8f81948468799845352b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM7282441304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56407229d9655b09f6406655c1495583ab814ef39a5c4a129d5dfe2af1549527. 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/USYBL2402483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab65141eabead69d70491bd13b68f8a100e5e47803c5d8b8c90aff719828f85. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1505097.