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 0x7d9a3578661b9b7f4f920bb7e1e1caebe7637bc77a70fc5c9228033c5b6e169c. 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/1867fd3b-e8de-4c04-acb3-4938d6271407.json and https://artists.proofprofile.net/proofs/artist/1867fd3b-e8de-4c04-acb3-4938d6271407.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 0xa8c2c09bfd27daa019ab615aaa75777bc9979525df139936761ea42620e57a42. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GB8KE2206982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0598314697f5892fffffb9a305f7d8d6857a69ab592eb5dbb00fee594b8c59e3. 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/GB8KE2313259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda759bcbb81d67bf78ca35e9fb94df5de7d850dd412352abbc75942f4e400b21. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GB8KE2314618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e10854909a6cce72524484f9e00d3d0fa85991dbfb5ffc475683a9fb0d540b1. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GB8KE2315319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f530428ce8e39747f6b4ad756d802822219a590b67e9ea77078c2626afb9f5. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/GB8KE2326454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8937e4bd9c9651ff255f606b17ab6c5fa761d53a6b338db925ff97670ff2eb75. 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/GB8KE2328331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5b6fc0528b9309e184fe44a940a5a0d8d2dd642bcba31825bf77d5964fcbd6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GB8KE2400931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a73818df8bea91e057ee19ff6fd7fa2ff65dd1b025c56cf7d7584db6750ce9d. 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/GB8KE2407516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540cd4e9b73f8c4643e4fcfb95da86fbf684828453544a3a15035801010e2f9b. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/GB8KE2410410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ec0d3fafcadbe092917a61786297b67d49c4cb2a1c6ed4f0e001e51ae702cb. 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/GB8KE2411418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354a8776f8fa0a573baba1c67e57955304a78b072c0d063d26c270a66f83ae8e. 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/GB8KE2412867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4830a76aeff3cc799e2c90f9b49ba4b903289b0e8d306d812fb8442294a7c2be. 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/GB8KE2415258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e203bd55c704bf10ff30927c64b3c552403c19d4cbbeca58d9311394d33051. 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/GB8KE2416461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d90282a53f7defc1aa5ef4e78bae48e4ef294dd356a1e14b0a58149f6b50b8. 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/GB8KE2421172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11116d49824e192e88943738b58c0d3e2a331997163db471c81693942775c675. 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/GB8KE2425319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3ce7595a1d224a109d5588205843d1d53cc3a36d0547668f0412b3e0c3ff3f. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/GB8KE2504657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3947e220cf566dd28c5b14dcc2226391829a19db83dba222df07281ff70bdb4d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/GB8KE2506948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ebc4aa5862d803e66a09680d324f16aa5acd24ff72bb9ed46df23b046b1584. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GB8KE2509980.