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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f0f0dcb43f83fab71b7c467c76a7fb41fbe43ddbcbb5997453732e54ab1a1b. 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/0e191c21-0c84-4b78-8cb1-d1a8e089315f.json and https://artists.proofprofile.net/proofs/artist/0e191c21-0c84-4b78-8cb1-d1a8e089315f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb02b9b8520ca80e83f9fa6e640621c904b2d8e40982abca5edcda5a635a481. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYM122200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f9dd6f35da6834023c32d60aa9c840de4c456a93a72eb06311dca3892aa616. 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/UYM122200322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc043ecf68bee3aa373637f378d81badcfd1294cb11cdac4222f9a6eff09dd3a4. 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/UYM122200317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022847063c0e64122bceb866215ce9ce4a915a831488f69ec54cd71ab87e0b84. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYM122104688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb02b9b8520ca80e83f9fa6e640621c904b2d8e40982abca5edcda5a635a481. 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/UYM122200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb8c5ead3966ae5487522af9e72ab3886e9e6ab13bffc7800e53aa67b10bc63. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/UYM122200319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3249979cf5ed3dafe96c4c6bb674bfeeefa3da1a35a8369239117662d3b9b645. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYM122200323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5e6707949f14d9ac58b440e0663aeaab36ecdbf6c7043c36ecade4ed24305f. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/UYM122200324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5ed40a1e4e0398405f7fa6ddc5cb71ca2752a6a6dd5d3b1dcf2d8bf8529971. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYM122200325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac027fddfeef67bbace47a6f22cd8b2fc7e0fb612f257685f6b341a99af0326e. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/UYM122200326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f86f3fb64490d5a8e7727c783016d515832cf05d0e3747d4733a171e20b7fd. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UYM122200327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a419951b26be415b0cf2978bd6fae1af8ceff831269b28752330939b831736. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYM122200328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ccf57545e8c3e07b39930157faf70ca7e035c1ec02e003e6abacb4708a5a79. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYM122200329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26536a13ee2a6420d2bdd380ae97c8fea4af60db2163906e05013757c98af524. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYM122200330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d9dd4dec9d2e8094d870c8587d0e049f14f1822f79279c0ecfc9ff430f3dd8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYM122200331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3e6ecc443c7e575c97d7393f980d43e28526e39374fb931a50c157e557c7b2. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/UYA139500117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6ba3c9eef9e68e7c45682b55fd878da7919a47706c582d37fcbeb71a1d1e0d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYS051100197.