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 0x552fb3d8e9b5c65c01f06a3be3fa46eab214e08d05877250f0f1903a2ed7fc10. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/401656d2-9c19-49bf-95d0-1b0fe941d11f.json and https://artists.proofprofile.net/proofs/artist/401656d2-9c19-49bf-95d0-1b0fe941d11f.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 0xcf35d7f12e9c7790e7d517c15feff309d74a2de0ab53017ed16b0f6101bfb1aa. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/FR6V80720115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf891f8e8ea208c0a1e8c7412764592f4ca8a88f46c5ef2445d157e3d723b5b60. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR6V80720116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27d5a33b7189ed08a79315f32c1b30828a70dd7e43be0047f61d9a5aaf97353. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/FR6V80720117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07468a1624b75a4593f4dd8d55f19a242751eda16ab9ece9cf1fce686aad6444. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/FR6V80720125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292f69110ededb002df285b9ca9dab6a1c0a2c155fd80d3918372818fc76e372. 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/QM4TX2335428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434faaf4bb18c3c0f9794a340994c5e049790a19a60a5a07f25bd302c1553fe8. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QM4TX2335429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758d1850934b5feb53ccd908b22a348925041267e57ce00906fd9a1be79f308a. 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/QMFMG1498091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ed685e2b5c58b88900efa8e4b64ac457e8f4feaf272164bd23556d0152a896. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QMFMG1497910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9adc2dbe11a58075f054ef7dc20efae9eb6f0f15453dbd0df3472380f338c5d. 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/QMFMG1497912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57248fbcc675f2218dc7f9fd10e2687c8e8ca5c41e2220505928458c2323568. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:20:35Z), 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/QMFMG1497915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6a3d107a559237de89adc576f51a68f658997cbbfbb59a4c465ed6b1aabdb4. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QMFMG1497917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2b71ca952b6d3ddd38c2d16bb65dcf8f84fa0520f40bf4760ddb5bef3779d8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:34Z), 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/QMFME1532670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832abd171a9115f9b1aaf42d53f77c9d148257bef4e72d46fefe029a108be8d4. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:04:55Z), 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/QMFME1532671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9519ae5af552cc23c794e6d9d427146b204eb4f1b2b17a9296039860b567776f. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QMFME1532672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e703b784d709b6218a812d07affe87c18936a3e0ad4a3ff2c628e45fba1d50. 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/QMFME1532674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8d19d283ca6a8f8bcd2d545aecf3c1d23306ef855e9a7e2d5a06e0be3c167f. 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/QMFME1532675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0673a382fc7c678b9437db3706c55c1fe3db202b3ccbbf91d5292d63ed89a142. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:05:13Z), 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/QMFME1532680.