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 0xee8843220b360a9ead53ab9da58d1c350711786f4550048ec850f6628f205927. 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/394133a0-1224-4456-b61f-45addcd7169b.json and https://artists.proofprofile.net/proofs/artist/394133a0-1224-4456-b61f-45addcd7169b.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 0x7acd912b317f1b42d18096706a149e466a00ef578050686b5d9529340df7d8f6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZN882246010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01de9bd97a0da97636c31559ae2df3af1e4b1ceed79ae182aa703903c69ed602. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USANG2259545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd52a8e57d5b72e6a0183f941fb051214534449cc08dfa15df9411ae982fee79. 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/USANG2259543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8769dff38b01f008f06d4b604c6acf9208c3f0f8f2b6aa58c281239fd2ed1b39. 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/QMANG2207047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ac3ba07dd0be9ed3f3b2d6640b72c7378a6200200e1677206764396a4d91ac. 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/QMANG2207048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a65b9b5a2f7e6544a949613f83ce9e4925fdc0e38fd7c66c8715a345b070a33. 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/US3DF2420468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b30734e35f4e1f246f68c600e3f743bdccdc4d264fcf63a50651e8da41eb1d. 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/USANG2440155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bb20e3b9a2966147d544fbe9c76e8cf2cc5dfcb44cc040b25497cb3de309b8. 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/UKZGC2307386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a572e66d837d860e8544a74153a00bcd2f23a75e923e2365b0c68e072746776. 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/UKZGC2307388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35904a764f27868e915bd461f96381aa4fcd51099658c6cf1f385ccc10ad8c8f. 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/UKZGC2307391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0024fa38b6e9f5cb6b555410a9176d3c6bf4f3afe3b208a434aacddf6ba7af5. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/US3DF2469607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0839819fe217550892ca3d301069cd5bd03c00e72187a7590e8e6bf9f1c954ac. 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/US3DF2425218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b30734e35f4e1f246f68c600e3f743bdccdc4d264fcf63a50651e8da41eb1d. 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/USANG2440155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d966797452f31f062f2c83cda86c6af6802c175d30bb5ea1024da578800cbf. 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/UKZGC2401391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432a349b49716260b4a66de9422897cb5fdb71e5b1953c5cfdba265e5eb3c856. 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/BCD4N2300149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa941e6066ffc3af19eabdd35e2a478103190359971bc8c9c486d7ea528e389e5. 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/UKZGC2408339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a364395f8c48f50c13fc3efc3bfb32d3cdf35bdd27eef602e2cc5a969187b03. 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/UKZGC2408343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0325e50861d294192b0973b539bd5d71ee389a03c825f6c3c2654a0f637cea. 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/UKZGC2408349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047b6a3c7fe70794a12c014ed8c53898f806bf04ed5066744397c5ae3cf61b0f. 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/USANG2214889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f34c8961214fc7173dd31ef3b36001f7dd16b332fb3bea5c2aa13a7161fb7af. 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/USANG2452539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8b2a228ec7816c3f46957734283650fb7339886fdd50d7242fe12b8bd5a2a4. 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/UKZGC2308384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04921d275da2a79cda39a328f56e96f990a61eeb606c61e28954f25f8ee1ac1e. 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/UKZGC2408623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b72f26b0034e491020132ea61a554f6e2d53c542c842d7cfbfce625484b3d99. 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/UKZGC2501336.