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 0x03c3149544aadca993c364963e9ffd414cbf87b7f849bcb4cc923a6bbfc546d5. 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/86f2be4c-8906-4a49-bfd5-8d2af476ca72.json and https://artists.proofprofile.net/proofs/artist/86f2be4c-8906-4a49-bfd5-8d2af476ca72.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 0xcbde8de6a4abd29324f3f1d8c906c118bdc79371df0aa9668cd8e43ed30ea872. 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/DEZC62278507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f018f3eeea0294195513425a850f004f9a65353a3846faf47c6570e3d99300. 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/DEZC62433384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb038e71a7e693eda55daa13a2a3a972fbd5f611f1f1d4175e59c15c3e89d501. 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/FR59R2503345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6862350fd03732baf6a11e06dc5efc012d5153cd75cf4ffc4ecb20af34c6c6. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/FRX282536334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6276dc1f8cb5af65f9e6b164787e57a8eafbc1f410064270cfd468ac913eaa6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DGA052564245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8ef2649868eca91e29c4ce7b6c442f3ff5e84ca655893482ce471fc98bb084. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEQ022390450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76a1f980b7aa2cdca69aebb0ec674d0a79b0988d9773258c3421dd7030eee46. 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/DEKF22200565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69326b8f063578dc6a7974c688bff208fca1ed16064c2d379c3d6adc0704d465. 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/DEKF22200566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4eb25ac9f9daedb24b2f3648eeabccfca1174ee37d6ffa97da9ed1e4878064. 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/DEKF22200567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afb20222aa8e32e68ef9fae97db76891cafe17e7b88b58376de58e8b37fd22e. 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/DEKF22200568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fec2c75d607c79403ae79651278f3e90a943e011e8c4c51a417fb6d225587b5. 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/DEKF22200570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815bcd7940535a9397d28bc3cbb500a1b564f127d04a3d209969e9cf2e386ba7. 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/DEKF22200571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b938e3d197af99337740fda81fc1aafe492bd9407118c0400e740f776f06ce. 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/DEKF22200572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d02916d71fc7e613b6b54a6bfaba6626051792938999ac190d747a97a346c7. 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/DEKF22200573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe620a1e39001bb31aeb5676258cf9c0d94c4dbacfe2d3b0316480094a72d3d. 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/DEKF22200574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf822d2f35bc1d396d7f6b66788d1ee8358f9727b57d1375b1b152784a2af7152. 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/DEKF22100573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b12abf816a265a8a22e01aa5d9eee84db88f0b78c4707d84da518e2a3810aa. 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/FRX282490248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200264e5bc32d80f1172719be19d67da04fbb972ab2de33d274a141c01dfd43d. 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/DEZC62386220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606f5cbc6beee1a69045628b1697da91b522057cbf15a51c61abe32a24e6080c. 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/FRX762367122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e267773432bfca728f1b8b2a33681d225fe5500bde23f4a532c498260f1e4ef. 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/DEZC62208295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe620a1e39001bb31aeb5676258cf9c0d94c4dbacfe2d3b0316480094a72d3d. 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/DEKF22200574.