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 0x2ca2ac59e5181dd73ad3f6a0201b06ac6983a425b6ff7bc5192c132440b2c2b9. 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/a76831cb-8de6-4b5e-b99e-51277e26f5e6.json and https://artists.proofprofile.net/proofs/artist/a76831cb-8de6-4b5e-b99e-51277e26f5e6.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 0xd8159119068904e67da008ea5702d6b014b8066363bbeac948211d18bbeadc92. 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/KRA301800192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5f4d0a9028f6f9d78914565e3fa6e196cca09b3d84260bbc2b8a3583b8b2c0. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/KRA301900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af6a3caa947f16ddef42a96ca45c1186f042360ae5f5303da1dde3ec2fdd4d9. 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/KRA301900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3810932dbc74c6304886b4eb1956c2a50826c61c5af2169f250351784a76b1d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:10:27Z), 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/KRA301900312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd695bdcaa5baf19d1bf076ff6e115857c8f29422e7e71f0a2086e30323ddb122. 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/KRA302100263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b76e49100ebc497a00f3e5c380d50d4c61c6f1a8f4930e56296494475b6d8c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:59:08Z), 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/KRA301900311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd3cbe9859591d6832915a5104527ec00c077a003aeac7cf3c10742ff612413. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:04:00Z), 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/KRA301800495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98e2f7de9fd44e318664dac4678f156c664172cee43c9fe88ea22332fb527f3. 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/KRA301800190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a87d61a59f457284603eab9a0936f35c8c8a770cb41c9d7298d7294a7236066. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/KRA302200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe16709167286fe28fe8bdfbca11c7e82471f38e3304f49e9848eff50f03aebe. 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/KRA302200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdce5709d48f67295a4861f99141d698e3f5dca4090e7dae7fc04603b675d4b. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/KRA302400375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5ed9ed6db0ebf8bfe6dc8433bd8e8527a3787fb3fe3f2b7689edf66f115eb1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRA302200275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78efb095df782a8e80d32fb8e2a881b5748cf7024f40f4c0e023ef233dba4be9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA302200280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fcd29beaac0cdb3c1a6e2f8f340e82f77063c4fbd4307ab361df8dfd3fa413. 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/KRA302000543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8414e69b9bdd0e451098115fab2a596d0474a84d7cb44f3a2c0d925f82d21b0e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:40:20Z), 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/KRA302000544.
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 0x80b93669e3af86466b4b66c9ab03a183513fed0a65e0435163454a4c0d05b40b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/KRA302000545.