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 0x371c4e45dfcdf14841f0f2b13664497b4ebe77c3cc6384952c17a921c15c33e1. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73e63c19-3d3b-46b3-a1a3-82e1e5c7dc98.json and https://artists.proofprofile.net/proofs/artist/73e63c19-3d3b-46b3-a1a3-82e1e5c7dc98.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 0x7b64a7ec6f23e5dfeb338bfe5b2aa1cc667bfa546718cdb5f6c345954c0c5fe2. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TCAHR2361671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381cffeea1220ff1b4558d7943be169519351f5153907afeffa90022205b9ae1. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:10:35Z), 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/TCAIH2445921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc8b7d68448ec11f56d9fddf06797c97dfd1a25a5a99e1c06d04b76bd531f81. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/TCAIP2452157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678004e93b1955d0b529010e39dbb8b8865485f86f3f8de77bc155ce5e3e5764. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAHT2327730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3759b4998bdd988b536fa255663f7d29e6061510f8f41edfe10ae1389f8cc9. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/TCAIW2417999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b476b7f04bd9223b97ca1f3d0472ec601a2d42431bcc799ee5d6ac43cad47b. 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/TCAJE2539136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b3a62ab11ccb0765bf7b358014e8335f063ddc7b7b125bf14bd0eeb04109e6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJH2548972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdfda2aab0d24e9148e8f3845bb209bef1ef01831dc075d1657920f2969caef. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/TCAJJ2542024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ec0edc090bc663cfb10ddace6df1943dd61fe844f94cb0a1370b658a5f948a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJQ2538920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85efde3d173dc4ceabccf31fbe1e6e92ff87a2d56165910363f33c213f1764a4. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/TCAJW2546363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599f85d49094b2467f88cf91861e0c480ef8d257d575bddf211b6fa73734e021. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:05:57Z), 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/TCAJX2559856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe277df90e2c0eba4cdc8e8131d85b3c2e9c28c75de8e3b3babcd03dd2b9ec7bc. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAKA2501341.