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 0x985e8cf9cdd22ad0bfd3f66894afd1f3eb8412ef7217a884c1eca948cf8d5b08. 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/c7d76d98-0d78-44d0-a36f-eb17f6428f0e.json and https://artists.proofprofile.net/proofs/artist/c7d76d98-0d78-44d0-a36f-eb17f6428f0e.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 0x5e14371c44cd446c882bc74e2ad19e6625f4bcebacd616dc9021cf9bf6a3aee4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA62287058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce55bd18b2891b0700d6910668adffa3650eeabbd8373a4957be5cc8efb04d7. 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/QM6MZ2405326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d260003cb2ff5cd0c1fbb403ac390f6ffa154a969855815b4a4da715fe71bf. 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/QM4TX2289725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8750004845b72482187bc9ba1d2ed54515cfd7656ed56a64a4d7ba84815aec83. 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/QZQAY2312902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b8d4dbe713e5e52e99eb2479d4cbe315eefa41b16cd11c78579a1df9a4abbe. 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/QMDA62309942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d244871812bc9a923bab4dcab229006b0cc1ea4af6e84cfc093d311a193645. 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/USSD12200870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc490da9ca395e6df28e278d05f3ebc60cdda0dd486a3b20d515a6b2f46e15b43. 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/QM4TW2276124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810e52dbf5856ccd1b0a2309133e95bb6c83f90ba56c5fadd153df97cbc1516e. 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/QM4TW2276125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59e16053d65dd0ba2d9faac38e2bdfacbefb16c269037cc16a710b7c1315f16. 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/QM4TW2276126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc5fa5dd4576aeb21ec7cc7c26725e548bd02f9c95eb28ad4d8be0126eecb6b. 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/QM4TW2276127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f7968ea5d0a3a455827886e7e26d7f97df388096da4031a8622a73f90f0f47. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TW2276128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd302d57da93c987eb774418dbeecb8921013ceced1ea9174ce7867360d569e. 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/QM4TW2276129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d4d25869fcb13fd4f3880818f232383c6d300fa9a7f337ca01802f6c7becbe. 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/QZKDT2100158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02e492fa4dd21eba5579b069af60449c286736bf006b3f5fdadead558a40dc3. 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/QZKDT2000454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa29f5b13470796130beea324bb5e45f43256c0d8cafd303e090951142017cd0. 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/QZKDT2000343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2402ff03f62ac6df3501bb818e09dd601a8963cc22fce112940e011d63660f5f. 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/QZKDT2000296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd83084994ae2e46a6c22fb846c635e67f43d220eb984be4809b02597cd2694. 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/QZKDT2000273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc904c06c3bbaad446d8017dbb4e67c68a8ee8fe4706f0f103e2c276d13f88fb4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/RUA1H2075608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9181518864bb3b287ee9938fd5ba07bbf0c77da78a500207bd2535f9fd4cb8b. 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/RUA1H2050738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796e5f4ae3f5a5e6d3eee3b05a8888e2c79a0231e7d156c72f6f875fd7a0c81c. 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/RUA1H2023526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb98e4efb067460088833e6a40ac55d9e3a5b8249a9b5eace4f4b4627be1db52. 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/RUA1H1915045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a98f9cec911ff25b3c799bec4dfb21990c00003388cc90f1d6b756a1988b33. 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/AEA0D1994068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea3d474a7edf1c88a42d9aa2ce5766e4fffdf9a0505792c698c1d0219dbc50b. 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/QMFME2163655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f216cc321d05cbd3da90a29f358db26843d95d8a66df2e46f2f8358817a83b0. 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/QZTPX2363250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372884cd895c156352e75be419a9c60f9d38af945d99993503ca479b71ac8693. 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/USUYG1439345.