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 0x6b137afb6eb88310aef4fc73afe8d0fd47d7976fc4aeb1cf1029c4d086a5e066. 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/2c48c43e-b2dd-44df-8121-607950234500.json and https://artists.proofprofile.net/proofs/artist/2c48c43e-b2dd-44df-8121-607950234500.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 0xe6f44585208928645f79c696e8eb7db68d083de95d5613cc6e11f914d4a1e781. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/AEA2W2357998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4b1296c5824e4cc0277ea1d0c7f84da377d38c41f5eb9f71fb8299de2efc91. 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/AEA2W2358005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2389b41b9a73f568d309359acf7f26d23ea0f60a8f596fd150ff14466c2c217. 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/AEA2W2358007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cb82b25367ad63997a338ae52f61b18389d7c467b2772bdb63f4ce9e5ad27f. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/AEA2W2358009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8357318fdcdd7e3858b2932c5cbae7deb6f720b54d61a9cc686e287fcad3d1dc. 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/AEA2W2358010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7dcd87cfeaf3f1488aaf94dabace0a6fce1869162b7244901a05a091644ae0. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/AEA2W2358015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e19c9555c07968e443c217cbd209a135d7c00cc3569603ebdcf472c720288c0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/AEA2W2358016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3852ae5e3597aad77584b80051e3cc873c6493c504a6994121b28b4b1e3aa0b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/AEA2W2361200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b1e06aef5eb0b5b7f0c2c1326910e0c61cfde2299428454d80ec737c7dcb00. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/AEA2W2361203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3263cffbc7e79f61dd410fa7577a6cc5c53aee4bc2c26b935a5455ea8f04d55. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/AEA2W2361205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bf42f41fa6131e08f8a88674c970ef4a58921bec5a738c6ce3a849e345ea74. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/AEA2W2361208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8353d45c7b8b9ebbe5d90bf4a710ddc926ffd446f0611691ea8568d71dcb5c18. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/AEA2W2361211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dcac3825afec0ca2e3fbf1bc6a330531d200f145efa7a2e5fce871be771517. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/AEA2W2361213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3d3b26b694d98477f582ebf0dcf9d06c6388cff8c20093702620e189783fd5. 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/AEA2W2361215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2018d2c336c667c645249a98e16bc98c717c398f8086f929f3a060793a36cbc5. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/AEA2W2361216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a260b968ac60cd5e41d5ae4fea1ab37d70594e4d0a7d180c5816a20e003a95f. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/AEA2W2379429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec01583c58dae17d6f1869a5063aa232ae4570e115527afd218eb60dee5e1486. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/AEA2W2359028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949e79366d856f30cbc5f0ca33dcc7c9a60d0ad56ec47ea1a964eef1f8b666f6. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/AEA2W2359034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801f167e2a4410ae8a3bdb831160a3febbadae2ffea44879336ee8e29003e254. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/AEA2W2359036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb39588ed04422162c8d17d1241a745376d79a2e063e1efeafff1e0090c59365. 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/AEA2W2359040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3220a4dac68c1d07a8d0a955ca2d258f6518b1da7f56c28d9445b18df4cba13. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/AEA2W2359041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08106af2d0e9063611521144d506aefb6bbe7492bd76b54cc4b80ba683291155. 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/AEA2W2359043.