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 0xb21d440f2e0dbcd9ae0fd48a9e2cdd5a75bbd7f8d234a7241d98879464059b43. 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/98acddcc-13af-40b5-acef-6b45e509bb63.json and https://artists.proofprofile.net/proofs/artist/98acddcc-13af-40b5-acef-6b45e509bb63.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 0xe9de4f5958be258f5a542a3286c8afecff559128d99e4127ea49f9d196ca8d03. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMPKX1878977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193eb103db8a0e18a18fd5fa11e91368a370f11d371a8ee7d2cd46f5d5b679aa. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QMPKX1878981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daf1514b09c60a859b14ad90bd5a4db2697b2de222f1f49c0ea810b35de86a2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMPKX1878982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3ed08b977648deb6983e65bd25673081ca9b866c2a343fc3decef2def998d6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CA5KR1563665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4b4156f5942832741ae47bf49ae89b6f39aaf352efda049ef1607f8d2ca465. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CA5KR1563667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae85e73843a8419157ac3b97f64f12b26b74d0500ad5336484ca4824a7cf8bf. 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/QMPKX1878978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc3e31812c4656519191d7d247a4e95f6c137adc8f3d25157178208ebc38d5b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMPKX1878980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afaf407103ecc50997834d349f0c56c397c974dac06c6fc78686862f16473e2. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:37:21Z), 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/CA5KR1959954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276f6379acc065e486a6b36e289d06d6323d9d3524b1ad53ae881226507690fb. 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/CA5KR1959953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5023e6bdfc4def7c51869707db13111a2c3ddc5adb52bd60d754eee0489aa9. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ZAQN32102187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022759e0fe89126d8fee536152d5f8a012c577b48b97cf85950674ca6b52d0a7. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/ZAQN32102188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b482ae20300626238afe86ed5d8a4f376c825eb9382ddbee95385b57bbb58c. 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/FRX452105485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bbe365132cd9511c0420265f6a1f96dcebb88e88262eeb7c4796332ccbfeb6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMFMF2454849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ae509e569654895e4b9957c3eeffbba97337d1d708ae95fce809e5f17ef1b2. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:30:14Z), 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/QM4TW2508790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1b6da20e7895b7ba2c23c52f0565d14080a1fefb3e9e65247d0b64a52b1aa5. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QM4TW2508795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4185fbc2fc2cffd90054a4f5fd291ad2db3cd1b4d27a21adc6635da92051353f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMDA62559672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2ef5f975e2532c195fa3ace890bd93e37c5ada4ede449b3d3d66daa41517b2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMFME2531165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cb49c9aed7766035acb8f3fd351226a05e840907652b38aecfb98a560a0547. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMFME2528349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01efc19a9016fb96eca63229ee4d27ae4c26cf0a6fe7c1f2c5b3a005cb59834. 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/QMFME2524293.