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 0x89390eccc898f3ddc4fbec074e470e9cd6f165214245cb97601f3dc5a5ebda0f. 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/05c6d025-6219-4242-9984-8b5cfa6079d7.json and https://artists.proofprofile.net/proofs/artist/05c6d025-6219-4242-9984-8b5cfa6079d7.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 0x2bd58dffe820ba2f0be4b777e1fde30f9db0df3ed13124ff3a79e91bf1515fd5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SMRUS0058526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166b2e6b6249e0eaa5ffc4086a528d0ed20757b570aaefc1ac2d59d6e58bbd05. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/SMRUS0070402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f20a5525cfb0e2db4a863ab72c08be6c212de02dde40400db075b7fe37e7a73. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/SMRUS0073124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07412d26c8110b34642b8885270e96cb4113d0822ba0c1900c1e5453796adb0. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/SMRUS0074737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe754a9502dc2e022ac6346f9f280575c8f87899e8b7bf1c9bb44be1b110388a8. 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/RUA1D2374632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b1c05afa83d5398af14637299ffd70f9e1c34f5d38795ed7b969adb31f1d2d. 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/RUA1D2408739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519ee609e99a3951d7835261d6ed9b65c04cb3905b3721d69b2d69380584172a. 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/RUA1D2423648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10e808742d104b3b81b31e22ef83abf32301b1a06dde8240fbe2303669f72d8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/RUA1D2434841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdffdefbdb7df448d2a32d50ac0304dae0afdf179a42a2615ffc377504e6ab9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUA1D2466262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458a15927fd978b9cd53f0ef4d2f2791bde9c4c999ffe1b8c227c93a41904773. 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/RUA1D2480028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637a09fdf9e55bb24bd4df174b07fbe3c68a7c5fd02e0e7b9a65af665686d189. 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/RUA1D2488742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc5e6ac18501b2a71dc8f60f5933adf88877f2c86c37f6511de643dac31a61c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/RUAGT2407584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d19d362e1bf3eab26e1f3500bc6fcaff7dc141c4cc88f2a116faae3e8304f3. 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/RUAGT2451610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19560f3daf094d4d9604a662dbacbc8e0c63ee2eab3c34447b9dfa6502b9dd0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/RUAGT2451612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8343646b9d8ed94308106a03e6de74d9e12559905adb7057934a5302e9a60519. 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/RUAGT2451614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe13cb4138e8834465d2552b5ce2da26f72f27729189b9c96ef108f7f99ba17e. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/RUAGT2451616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacca352cc9fe4f6618ed1244ef677a7891103e2c771b6f74caccbfcd179d8c3. 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/RUAGT2451620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0044afc96406ec0e5b44ad1ffd34328b6d136c82af6ba3dceb1957fca27a16d. 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/RUAGT2451622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad9c27461320c19e3efe88b66174bf3397f24aebd3457106620125b60e9339a. 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/RUAGT2520357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb56f111f7392f736e97cb802aeec54dbc75e6ffadefc17f3e1cee291bec86f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/RUAGT2545746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6171ba277909ffb21268bafc372c7684731d8e06f797d41041ec89c427159c8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/RUAGT2587715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518206926dfc0f1ac2b330de8b1204ee956214058859f31acd3dfc0f3dc6f2d5. 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/SMRUS0057449.