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 0x9c01d1ff19d6b4f2719427815f6ee5008500e0de31b506cc7af2e0eb831f3751. 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/0f671654-5f8c-4bea-8a2b-2ec5b1ddad78.json and https://artists.proofprofile.net/proofs/artist/0f671654-5f8c-4bea-8a2b-2ec5b1ddad78.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 0x62bbae1cce965739abae1c44bd9a6084483befa12b8636f20dd161b5c898e0b4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/KRMIM2036498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0c98b0f1079c02b41f9e246c749640d5bf8d02c538517822f3bc18779a3f9e. 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/KRMIM2100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ee652a610b0bbe68a1f0d5a066f625bf2499fe91fad3c74606a045b4788b89. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZEKE2025953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1f4b6cbac024b2de49393292d39c6048fac429cf1a6462dfb3755f2ed96f74. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZEKE2086124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7144447ca28120b6dfb3991de791b88302162e127baf155041c92f945082e25. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZEKE2086025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974522b6eeee586d422157e0fac983accd83f71f11466529b27cc3d1df764de7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/KSA012299840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa1054f3dc67ad3c0aa97b309bcdd3f7c6c5968e8bd16804a9f1bd1430dc496. 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/KSA012299514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2538c3a0d8875937e4fa726882ade574ab324ee2401e25480982b737adea9c9. 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/KSA012299264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5deac4c052e5814bb0ebbf0b4a31a34669e06374e2a0386fb9ebd0277ec7630. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/KSA012299265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec208c075726ab8bbee372a3f86a462b3364df5880ab65eda8867123bca73de3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/KSA002320441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3a6251e847a0bb65e6aa1e05b66cc0ac2248f0b84573b3d384f1a7627e672f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:08:44Z), 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/KSA002420187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb483cd00839dbdd3ce19b9494e9bb15c4161e3a8de74d5814a7a45624373eb82. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/KSA002421518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfb6f9849e76c0e54c706e63b2aec7a4533c4602e5732939380551233962587. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/KSB032500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289879c741cbeeb9fdb36adfc678ad367d6f14818639fda32608a441a9db21ec. 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/KSB032500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff786127fa403d6dae2bd1a7edfc69767fdfd4fc13e2c7bdfbae14c836ac4919. 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/KSB032501203.