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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3507e1157018613ffa94bf859145f0559eba3667fdb533462fe67f796de5e9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72e27eec-fbe4-48e8-be67-fa2af7c6554f.json and https://artists.proofprofile.net/proofs/artist/72e27eec-fbe4-48e8-be67-fa2af7c6554f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1774ce26d80f1a1802c85970fcbec70145e3034872fb64d8afd63bc380c815. 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/QZMHL2340470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5aaf81505a6948185f6336b05c623c40cd14b20ee8c12bbad99b1a2377cdc0. 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/QZMHN2274944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810ab5ef02a2c953f521ed8b3a53bb3468ff68e634b62caf1c180959a94d5084. 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/QZS652380822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077fdb41ff0c5e2b8a5ad9ccf3a53e6b07520870946ad6f7a662738ee700ea49. 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/GX38U2441182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26a3ce0e12f2b7ceb9292a50509d221092eb4403a10e437fb81455a61540b4e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTRX2445128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e930ecdbd738633afc79023877328be6a2330ad0797af9ca68c8ab90566b0d. 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/GX8LE2401856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3fb3ec49dad439180641ba134466301b3a5e3ce45ea88f58007a2a798be3b9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLZJ2471502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42ebacb0f1a9eda1ddfc1878eb819e887510f5312d36ca4a0bac74b4d1b3861. 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/FR96X2492371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f08d088c8eeb60c1451d6ba189d643577163c898c6f118f77501dd65df2ec9. 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/DEVU52388001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff428928fcf2fcc496988bb3e178b75b00d1623b927052902971a38e1964c4b. 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/GX38U2357385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59392c0917594ea7ebb47ae7baf6a20adf30e2bffcbf673660d70dfce9316f0. 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/GX38U2337489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1928a5a4cf5f2fd8f00d786293d982fc5c9e9dff40d10d16a7aa334177532bba. 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/QZKDK2226611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b0071aa9e9c8186d00dd186654995545c24e47b96a94b830d86cdd5ace9853. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS662149795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ccb4c30f41a26ba64dc4bfd97c0af8839017919bae8a25e58e03aa0a5c6fc9. 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/QZWV32462701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8c89c3369ac00d4da00f5c7f318730ed5e28cfa904560952400064ff0f706d. 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/GX3HH2480540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae425be1a4d13dfba66d1ba8a5ef7d2eef43dfb8a9d9eb062abec23ca8524816. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS652269955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3e69bb19da96586d1c69753eba10ef32cdfa70aee7e67cfe86c85d33e27630. 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/TCAJG2503030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb91195b1e8e471a7f87618b24150cf9eae0c0eb6fd0ab5374785cc424ad7ca. 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/GXBDT2425202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1304ffaa4689b5503ab78f2150def725042f40eb2bfef718359d00d2a4ac68. 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/QZZ8A2431004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df123ea0470a9c74a76c0fcddb385ef1053267480541c23c7e241a70a0d9f4e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMHP2318218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71b864bedd5132629b835dd043b0f068e324977152ad6d25242478a3689a35e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS632328620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349b6c6275bff4b2b9ed47e2487bd27799afd456e8a93a40b9fc8ec7f6cda0d1. 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/QZS672215910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d89eaa1b58acfa55af16a0dc768be0699f3b31fea2bc99a7777c569952e7961. 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/QZMHM2252882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed962e6a6a72fe336ac269ab9e88c010e8d39d1d3ad4a903d9f37a7f307698c2. 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/QZS632220605.