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 0xe97aaef1e89dab47c77669550da4f557afe201b2c9868d1cceaa24c202eed9a2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/980a12f2-8ca7-40e9-80ba-06d019ad3e1d.json and https://artists.proofprofile.net/proofs/artist/980a12f2-8ca7-40e9-80ba-06d019ad3e1d.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 0x46829948a2c71bc086075cd6f84ab285d227b43b9827f469b06f6e8b51f1b4b0. 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/FR59R2277884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8917d3275a165626482b569a0f154021d9f4433e346b6509c76bd078802403. 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/FR59R2277885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76554e59b8d1ecab6643fc3df03f1fc3343bd569f1b54d7ab55f7f1cc85624f3. 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/FR59R2277886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f139d4bb8a2db2504c522f6e4a93e928225583751f3b81c85253d60ff654649. 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/FR59R2277887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d5bcce48d51ca7c018c7f4dbaa9ad89655e72c7f97e192a311891ab5fb95aa. 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/FR59R2277888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc82523cda4eb5279b78e49657f05c0bb18f69e2b6f87ad98af1f9a36b969b9. 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/FR59R2277889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4399e5b43ca5d415e7b0174e4d535173b9cf5fd12ad3185478f63b35d7d0d4bf. 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/FR59R2277891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1597468d1077ef7662718aa136417daa5c8420f07f1dd355e3e79afff99b3c3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR59R2277890.
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 0x0b90334dc1195b936ff7e8dc6188c4f42cc2f81bee28c802d393e527d3b74d63. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR59R2277892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43575e5fac04240eca75eecae4998c73b142223d6184652a8375ab09769a318b. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/FR59R2277893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29f79ed3c9a823dd086c7569a4c13fa1064ca0fd050ae8f03e3770d09d2f543. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX872005872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf0a2f2882e899923f95b33d7d4aafc73ad5a22e552258c5561ed5728f16cc5. 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/FRX872005873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4b04366ebae1e83aaa22d29be21ea5c5cf418010cc2115855b61272125cc78. 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/FRX872005874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead68b115ea664df94966176024dd74759f7c35f448c463d3d0e56290322a2c0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX872005876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1783978113df87c6c159e3635d00b467f109e5d4a3d0ef52f6e7d0a7a357ddf. 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/FRX872005880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde879fc42277cb917f28504997853872ca34bbecc222cb5f1b471f68a47de2a1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX872005881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0ca6d66c1f3d3d806dc1b300ebd12dcc34cd7d51fc09db74194cb55e62e594. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FRX872005877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fdba98889bd4bc34c15adc2e824bd7fa011089848c398d19930a1fe7226cf7. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FRX872005875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f79d9d0d3f98ded4e728da099add566b5dc21f34a2999b7b4c3bfc56ce0be9d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRX872005878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f5f5a8d6b469c0ddd382f5ee32fa62ec61f54d2d7c271f6e3557fbe21dc50d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FRX872005879.