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 0x138e9ff2ea753971f9eb7fb1f6a4609314b9421f20aec24f04c19e7731d5e760. 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/ac4d92ce-e187-43a4-bdb6-3bdecde9c58b.json and https://artists.proofprofile.net/proofs/artist/ac4d92ce-e187-43a4-bdb6-3bdecde9c58b.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 0xcd7108fefd5fb0b7d39f17af397878a1ee3b3cf22c00db95a81d3f4b501d10cf. 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/GX4R52305229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aac25a1d46a14abe74bd08a8082af1f0c006ac319715281b0f60b5240bde2aa. 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/GX3Q92073380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e786b769e9e6716250023a25b8ffde04260cea327f956896963f553ed60d68. 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/NLT2H2400848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cf44ad51d1f7066b408a4f7d5732d8ca03df8c5e16b497a5ef79eac2fadc2e. 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/GX8LD2419096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47c4481a217ad81bd04a6a27bf849add8a16b40a5ffecbe381b469e14392d1d. 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/GX8KD2428067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b1e8d798043f5090522fcccee265616f041903d9c7669aa07c6a5d8a57c82b. 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/GX8KD2333976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afbe7d667ff2c72ffabfc1dddd6c64febc1cc7315c2731dc7d0dfd13218d3d7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NLT2H2300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025b5e4ce86b01f6a80e2b4f8e1f7325de45aeb0ec49261bde27363bea772dc0. 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/NLT2H2300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6348b73f13f43d63c0a7d7a84fdcf4757ea21163a13dc118197770dd3582cdd. 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/NLT2H2300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1b6daff7b03329630af705c133d00e633ad0bce024f8e953578dc0c3458cd8. 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/GX3HH2218075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83efed4f9745cb5d473d6c840ca356122fe65312f6e58d7ab4ff7f6d3e9d1b49. 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/NLT2H2200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb5d32e3ca21eb0dcb98a80d47140a7695d4991a79c066f8b1a818adc30fbdd. 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/NLT2H2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796d68d002de723f3ef377e96156981ec1d5969f698222d9403d8b1375198425. 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/GX53U2004925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48301f5daafd19daa28764fa8f599ad6b540ec9200004c7f7c47ce33dd40e725. 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/GX3Q92176703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7200a6434ab764236518e308fe30fc44bcb56f0961526911d4d65f938e20d64. 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/NLT2H2100273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746afe438355c7fd5e1fb85c95e6c83ce89043d5d672d450f60d7eecb1c28b1a. 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/GBSMU9629656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e0a7141a20bebac5e6ed6a3204d77bb7948c0ebd4f4dd38ccc4ef6b72cb0ce. 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/GBMA22117288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684828096e162a105cc975c4c9e60db35164b060e889592ddc3db9a199bc2c69. 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/QMBZ92069970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a4a5a3891c8d3740d8576b1e8afb7b53a68cf6d79215b3c1da48776f72d15b. 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/NLT2H2000380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb7b889a60013cbf3d2b4e0ac65b5c1020021527d45cedde0f93bd26896d431. 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/DK4YA2009701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a2c4920ee7ce54db5a9cab378255785a33b64c3781ef67cc46c4d16a827b99. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM4TX1805409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8b36c455704777704d427922630c6b7502c86f59366a2e487c17748a14466e. 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/DK4YA1720001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594f13eb2e185bff731f6b0eb7cf328a25349b0dae964787ff0397a163dbc8b9. 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/DK4YA1706001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30354b3738d09444d55ba28a38a503f0b18fd932cfd2c3a3249484dfab2c1390. 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/TCACU1610116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7701192d55927856ca8179917eb1c8572dd827a98212ba31493289f28ee43c6. 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/GBSMU2398498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a536e865b108a09f891d0ab3696fc22d6d9d29eb56c94d6bdb8c793758f8ae5. 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/TCACS1601705.