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 0xd319166ab1dfef89024dfd222674063aab23b1324827340d9c2809930b34cadd. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bba0a10d-c16e-4b8f-ac04-6d69be16b995.json and https://artists.proofprofile.net/proofs/artist/bba0a10d-c16e-4b8f-ac04-6d69be16b995.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 0xea5cfab949cc09515ef3c8f2fdde623c4fa231c90e28d113df137e9f67c1b5d3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN32510742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb20c98b3d855b1512d33a977a00e963724e943fce27d29044c013577ad56f02. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN32510743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f3de9d4ae78402fc4c721ba2a8ed30abbffb5a27e40c008140e31f64a45843. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZHN32510744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2e7e7804d88961d7589185d000c269e135a679a371005b77c86f0dbb2ef234. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:28:18Z), 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/QZHN32510745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4339d33018472b9c058e2bd44f398a281cb4af5a8c63eedcaf6743f7c9f09c7. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZHN82509798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c48c93efebec0b05d4f655bca3e9316fe0a2bceecb062214859d2d41d187672. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:16:30Z), 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/QZHN92543249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ff49f12603ab299c71b4c3347e3265a8ae1fa3eb226e47a42b6d38b677eef0. 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/QZK6M2549134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4d747a07811113702bf7184ade66ccab6f40e546c6270ed3cbafa274aeedb9. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZMEP2516335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d103a3907cb4539a815d7ad7a35f0ecd8f9fdb179e5ba67d6f4c3e9e9811fb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTAS2595966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7ba42ae89f582cc1e3e28fd092895bee06c2e33ebd660fccdec89f32c4b8fe. 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/QZRP52547858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e1bb5305d8ee81ec5ea1506cee7f8ace41cd61d7746b7a95de2c8830614ac9. 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/QZTB72540241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6d0ad9bbe3b2c77d5010d3b35c7afe2505bc60948ca8620d0defa5f97bae0d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFK2557209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcecd979ab16cf8b1ea29c63f3c559582308fbd2c4ef277e7f84d8731c9bca6. 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/QZZ7U2540279.