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 0x3aadb3ee8b2468bc3b9928e61e147eba546d54f8ca2ff97783d3e066e39256ed. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9ad3e9e-6315-4875-affd-c550fc039e46.json and https://artists.proofprofile.net/proofs/artist/a9ad3e9e-6315-4875-affd-c550fc039e46.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 0x30b32c04056972ea45a2447faa4de118037c7e1f0f00439e52fc0df87721d0e7. 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/US28E1162601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0954fab9ef177e013016d4ac2aabda773da4f5b963b5f6cacad8421e3f7554a. 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/US28E1162602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5f06d3a163f8988777d547cb2d7ab810a2b1f65e4681804f18b1eba7f41c96. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US28E1162605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc123a416298d23c2cafb020c6f4d8e16b2666b762b6f5672dde6b6605d7ea6e8. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CA21O1300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679dd6de39095a0a5bf456c7b8a3c9d952b1e1d61fd1608e984fe80b1eef0056. 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/CA21O1300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fedd24e6607ad63f519e0f369db9551a03cd019cce1b677a90583177ec90bde. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:07:41Z), 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/CA21O1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d0ccac12ad044113a1a95c96795b211b95354d9f5a62c4326c1e948e7d4e9c. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:41:38Z), 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/CA21O1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa9ae1d7b818c3e52483f5acdc88dd1e1ab774afa2059dca63332629c397c1d. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/CA21O1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f150c447ebce4fb563eaa76207814166cbc39377000acef97ef24388fd399c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:32:40Z), 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/CA21O1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32c460cc6b43bebceba7c2dbfd703a3fb2f85f08f8ee86576ca0e6d0f104353. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CAF271503001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7744ced7d1f462c185b72421f7c1eab416bb0e8b4e3744b8f61d63faf021a408. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAF271503002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabba39593b8911a5ca0d8d59b1353ccecba9c655600e3dbf823a4de5ae852cf. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/CA0RZ1900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da6d7035b267ce359ca3c4bb3e2402e36885cf4cdbfb4f12e51173a351dd2d4. 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/CA0RZ1900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd0fa936aab681d786eed1afb4b6c4fb74725ec0675f13897e5156141ac72b7. 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/CA0RZ1900117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb9def7f3e60697d2c8279c19f1e00bc150e29b9d34ef4b3c1e2e75a26b53df. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CA0RZ2200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1fb6b964ff6439065fbc12b9b6b37497eb104a5dcd0de855978566f16e17fc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CA0RZ2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b522a2195319d1b75b12d7f396f4feb8aac630d4c87b08a7ce2e95ccf27aa1. 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/CA0RZ2200087.