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 0xb0f7f3a704a2e86b33ef9942d9c0b13d710a73f489f99c98a17fd0b1e61c130a. 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/be9fe707-3035-47a5-a8b3-480eae7d6ed0.json and https://artists.proofprofile.net/proofs/artist/be9fe707-3035-47a5-a8b3-480eae7d6ed0.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 0x83ee51b80407ba43c5ee0008677f5c9136dae7f5b6b4cd26f33d556294cf0411. 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/SE5Q51819478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6e979478a00eb747b92641dbdc9458084b21f47f337c44c0ca9132f93de36d. 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/SE5Q51807648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f95d7816af8e9b219d8a615870858a5dc6dcb37cbd6bb47cc949157ac4d9900. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE5Q51803330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb732566e3a71be052a909821be6164f7b1d0d1ba036249bf0cd11e296e6fce39. 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/SE5Q51809359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f81805570794f2a8c2957cdb2831b53037c5b050f62242d76e2d0ffeff43eee. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/SE5Q51808554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4ac5d3266394ac269101b9ba12b1103990298099e6d3017acb03d3e9950cad. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE5Q51819200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fd45b07a1ae1cce2ab69b30894f94575fbbbf67603d314522146545fc83d03. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/SE5Q51822061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157d97dc3c6acfe73bd2a80387fd6ec441b8cb60149fe0224ed78fc0ef2f7686. 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/SE5Q51817129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe167459998d55741d24716f594b13c5c521c798a84fda4773a39b8a1541f82a6. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/SE5Q51825102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361c20d50973709fb73c88a31922661ff00402cbbe49b2fda084700a3666d914. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE5Q51812311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3926b2ffe18d6174b914202a25d1b26542964f726dc79a627807e0340078de2c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE5Q51813870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b64df505ba7a905167f4834c0dfeddf878fb0a305ca3531c3e04b19ed833c6d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5Q51813493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7834ddce08a1d8b069624d63c3f1c7a9f4efc282ed0959ec5f99dfa11ab42400. 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/SE5Q51824892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ccb589749fdb01532aaf376322fe472813f049a6ff0543b43210cf48281050. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/SE5Q51807909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588e57c4fbe433bfe480351db1ec7b0b08d3455d4125520bf52a3c70450c52f1. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/SE5Q51813446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9231e4998c40decb2db440f24f21171671f55af90b54d3532831facebfd6d3c2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE5Q51809790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9350da895ef5c28a3eaa2d44e44c14697cfef104885be177f5c466d5848e4ce. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE5Q51809346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10142cca6afdd456131dd91e9f239f5d8a0b355f67cefc197b52f9b4a2c2b56d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SE5Q51823698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f05a4ebb3239422de92a08f6f56121db3ef153c5a5e2325a143e3a466c250ef. 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/SE5Q51815644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8fd5ce7f2fd5d4a7e45b593596939c09e5609276c4d360fe44282a987d965b. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/SE5Q51810719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8dcca0b5e0d7e1a3faee9d24a0fa4347b45d517fa1b8651a1fddb72f4060f6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/SE5Q51802791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6794a2f4fac7932693d762d2581fd5f9bc33277601db2f063d0db3094018d6e. 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/SE5Q51802475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc830c904190e6f8d1d8dadf50db51dfa7e2f7346ebaa27398571a230377b39fc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5Q51809689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfc791794f0cdc5d60d8a3278187f8139cdb29890de2669f733bf4ca6b78b63. 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/SE5Q51814520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d793b3d069b441d1eb86ff4e84d64d29764b00a8ae8f88c11c104b27060a9b. 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/SE5Q51822070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d474fd2a9020aa500a0359cdf06a61602914aab7fdf5883e4dc330a22d08a49. 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/SE5Q51822172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547fcb1a0f5b4070e19abad6d92c6667b797d3132cb103fed056bd88ffa51960. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/SE5Q51803157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe451f63118e1179dc534a3b82263ed8e93784a89cc03a1b8105605058daaa0. 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/SE5Q51801204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba29345cd3c21f59d2d8980060964d554f40c7b2c5e9ed7483c8c555a860782. 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/SE5Q51812493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1431768862aa33786467df00f62643131eb5e99473d9935015874693fbbe7fa7. 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/SE5Q51827031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e693d14810ba6dd89f68f7ef6f4ba2625aba4d555b51c893ca6b81c7c8e478e. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/SE5Q51806310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd990f93b8537c9644619b7ec2a5fe3128996dd2981690bdc7eb9cab42c5a611c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZMHK2266225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4da380d39db8c5021001f22624d1a7c2fc7fd0974a0985ab34da70b165c4d5f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZS642541746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f2ada79e574432b0d7e0f38e41f20a52f737e503dd0f3a61c00eb06ab3718d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZS642509137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd93696667f1ce7d9784169d07ef4646639359be9c5ed9f20d3632f3891e7a4. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QM8DG2518782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f1486bd9a4b6b73f600e69e2efcfe1fae2a95e9e138e8025d4f089a2e41561. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMHM2593259.