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 0x630ea288ce7f66a42526a98fb2714d105b646b0eeb2807a97adbec887ec27b65. 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/2ed3d576-65ba-484d-ad17-577ecb48fd89.json and https://artists.proofprofile.net/proofs/artist/2ed3d576-65ba-484d-ad17-577ecb48fd89.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 0x06724c7edf73988fbd6d136222946b0c73126b5940d26dd6d2a2868de9183ffd. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/SKA128673801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f55f134dc8d490acfe2394048054bdbf0b6b1f7642ea01c6ea7930e9a6d287. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/SKA128673805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff46c06b5b511cdf97f8cf7dcb9f95bdfeb1f2edbd46c70471698059621c3af. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/SKA128673808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684ab29cc1df3f7438f8010408a7e973d8d91d1cfae9bdcd52ddca470bfa3cfb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SKA128673810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c16f50b83cbc46ac24b1136b8244d219c8ada1fdb5c8c0e9eefbf5a51f2a7f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/SKA128730505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725917c93658a0782e8d0524edd586b48048a9e0a6c71abf5c461a249972d0ac. 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/SKA128784001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dec11915df69cefb1a6ac963496f5686e1f6b4669c9e05730356f9c742e42b2. 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/SKA128784005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c8a8bab86ea29ec2cb42c6ebb02f6fb0b76bc5f02c15f2fd9e1d4cb6da479b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SKA128784006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b615f24d98d46a558bd2bfedb1d6600243e05fad0b925e11fd3ca1e9b667af. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/SKA128784007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d7c2e8a2d93f415a6904213861667026528a67db0c7383d24814a68047f146. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/SKA128784008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1144077ef0141a893fa3e6167acfa2e84f92b500b24c1e4c47e0941424df7e00. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/SKA128784010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484d252560657dc247e8daa03e5d2e0e6235b80a41122a7ee9b2975ba2f7f64a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/SKA128919701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b2607f2349bea5319e8c48a43d08528650ede3d37162280be942d90d48d35b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SKA128919704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955f506cf28a108526ed14caedc2fd67ac28f753a5239575f9b87f612ca1a940. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SKA010209213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a329203d4c98b09416124a03fb89272db42d4add28e90dd9e9f5c05f5f40304. 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/CZF502000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb95c7391c9a0cf5d1e92a72c6dc11555be6c3bbcf2cad414639dbae8d9cf78b. 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/QZZ662451353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3001c4a629be75f70e04a7b03f6d35322792ac40c94b2176882d42917343238. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/CZI361800028.