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 0x170df697750a5660c2d932371430132978398e83fc823dc02647c17e46780949. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8246402-74d2-4118-89ed-8e5d914abef0.json and https://artists.proofprofile.net/proofs/artist/a8246402-74d2-4118-89ed-8e5d914abef0.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 0xf49d8389be7951e4562c6a3f8f1be10522599c358764938ae4986ee6f6a85b86. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZTB92466618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea1962e780fb40dda5b8564368c3fcc39a4bfb150c9aa0030ce9e824ef4e2f3. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTB92466619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1ea49e5f70a2f7a65aa2fda56305ee9812335350ea061f57d6f84968eccfed. 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/QZTB92466622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c74dc106dfeb8afb01c17166fd8fd7449be407ea92e26086fff83e2cbbdcc6. 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/QZTB92466623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c5bd7b45a609907c025930130088f63b7bdca2f4e35a0ef69c7314579210c3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6G2585549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb99dc0fc6f6ca5317f8dcc98b443cb2271e6dba1fd6104a2663beb876addca. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3FH2508469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cad6f5937059adab75905c7d705d4f0214bb24c363f26ebb02278c77fd12c1e. 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/QT6ET2586985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35210eca2fdd628052ff9139c1687c4e940cb96c9941d28a335ca387c02cd9e. 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/QT6ET2586986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b516784be6b6699646be67690894e024690bb9c9bab4b667dcb5df516c18322. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QT6ET2586987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1510f4422147854a9e2b8db8cfe9db2eee0252568ecc646c85f3fee6b13f98. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT6ET2586988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928e9f297f295955edec1ed90db23764b5035618ed8273da2cd441cf43a06a44. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QT6ET2586989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea4de766bc288ee90f6351baf42a49d42f70589ea712d432ad6aeb4d1a1cace. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT6ET2586990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df82a22100f3de3806e118d7181a1c8852bec2487cac42759e1e396af5d7ba7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT6ET2586991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb008c7540f89a84ccc25d566bdb20ba53e00a559f2828acc344ea15adc4d7933. 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/QT6ET2586992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71098ed2be11e9b3620324a139b02ceec4a24d6f1fb8af9bcc7c49445c68c824. 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/QT6ET2586993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902a950f7501efa14e0b92d4138719c4723f3a87dec0444ece88f0677a495675. 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/QT6ET2586994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a952649f72122f2598feff5812f3daebef2cc12cfe30b90e7f542804a2502f. 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/QT6ET2586995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8faf9d0ef551413a16208f86d2be548c74c4774492ed2c48689bb834fee78b2. 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/QT6ET2586996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed29fe915610642d8a78fd4edcce78855c4e484630057caa35d892c8a386809e. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QT3FH2506319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa56b4923b0b88eb95095db643999c993f6ebe5321d075ba6db82b7b551279b9. 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/QT6ET2586997.