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 0xd6f438d65a0cd186ab874a76ca1b84b3b7433f4cfebaf77949d4eafa32fd0659. 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/edf8a31f-6e89-41d2-9d61-2feeadb4c737.json and https://artists.proofprofile.net/proofs/artist/edf8a31f-6e89-41d2-9d61-2feeadb4c737.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 0x7b05e425f17514c5322e36ae57b38593440b5ea1f1e60c2cdb84ff2ade362db4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/RUAGT2448478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6248bd7b33366e087a29e1320bc4ec5de8d51c0d2adb1da7896164f28d833966. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/RUA1D2453549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0342691872a5fc24be3682c87991d305e0b7ea33b1b5e36206158115fbb1f97a. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/RUA1D2444770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb894f6dfb6987485a53ad5a21c4b479643402025fbeeb62a1668dd6f76d016b1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/RUA1D2432988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4ae0388e7056029c1cf1dc789b3b4f74d1b1e22ab7cd6289b9e81f0636ef66. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/RUA1D2432994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db039a298824ad792a6a910ca70628e922bb25900703c3a2fc4b9ecd9b5600e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/RUA1D2429142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d34ab416ede21dbad1c5c9a5108a9fa28b75a9ae9afccd0d545c21d6672512b. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/RUA1D2421136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0bcb55875f25635e8f856e753873f7c0e4a58e3040e514f6edb86adc71e804. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/RUA1D2419610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278f09e986f6d0c9c89b9f5f65400d66a2f8a003366a7b5b1acbbf7a3706a411. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/RUA1D2421089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb14aad1f7da2f7e7c4981cb0021456fdd7bdd5635fbe82f0523267c2c1fc9e. 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/RUA1D2419558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a612d8a467117ec1a33379b6eaee2c01267c327ddd53f53269ff49e406d958f. 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/RUA1D2409307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2499ca464618e538ad82b678d9be0721516eb4e74b39be20ad15a22aaab889f4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/RUA1D2403541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eae2535c162bde50005dccad89e5f0b0ada47f72b53f762a15de949b3dc459. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/RUA1D2402484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b74b19b4edf125c5980adaeb0ddf8ddbc3ca65c05aef574f05c96b04e25ec7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/RUA1D2404064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f0075c803823f026474180c97bf8cd6fc09e84a182dbb148866cf6c612e923. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/RUA1D2402488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3478111f3192ab70cdc0e9aebc9f646f7b45fc163414155b1f0033f5bd25616f. 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/RUA1D2404986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcac8dd74a77ebc1e0d7d4890df24f927f17695c1f0ab53a957ceb157e2cdfc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/RUAGT2378676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88ae2a1589b9ffeaf2324e8a6c21a8a9927758f4e93cf621612afd65c6d4cea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/RUA1D2402406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3739cfff7b37f44f8197962ed5d2f10af7bc4de700b516875166fa879774c5b9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/RUA1D2404987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b0d4d4cfc662557288a2ff7b9bcbb5fa68a547e50a78dbf247faa57269e401. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/RUA1D2404991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad47d22f8328e160aa4e8c4729e1af811d7ccecad9f7db471fd61a792b6ed77. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/RUA1D2404988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72b97974421eddcdbe26f693c6d0b976df7f63e2ae9dd765023b7546348aa2d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/RUA1D2404990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f7e644a59e88dbebf72c0afac53cf6a435717e92b47934ee2e447fa9d893bf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/RUA1D2448935.