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 0x88556f15804e33da7c8e6216414c90e1a2d09b65a9e636a7df5630de2b15e39b. 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/5221deef-056b-45df-904a-b7b6cdb0de32.json and https://artists.proofprofile.net/proofs/artist/5221deef-056b-45df-904a-b7b6cdb0de32.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 0xaa2261f1c7c18b58432ed94023d27cfbec10c446a89e24a2c50ffc27c9237f42. 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/GBKQU2455566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7870ca5aa5322ecdb7e062a25d10cd9ec1e5252b4a35607987671d8b332aa64e. 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/GBKQU2408752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628e7ccebf49351349cf5a28233269d6d1b3f9266571899cd1ee7063c66db0d2. 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/GBKQU2408711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccc60badac6fa4dd1941b493c6526986f7a4b697df8674d2606145658be0574. 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/GBKQU2408696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674e5e594cccce45482c3a468395834a84de6555c410e05c63db83ac6505a3e2. 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/GX5MY2357603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435bee63a8fa58da1264c891d1deafbc57cdf7a9be8f0230b571ebcb866df4e2. 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/GX3HH2358509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec95ae5dc3c82ae138ea6d4ed07f2cd9b386efad66f811023daf53682fe5543. 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/GX3HH2385120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7a796738979964390facebda77475eaea6cb5676e85bdcfea2e19028a1b3a2. 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/GX3HH2381489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ea90df8537ee8e5a6743c3be1d078504d0c74e95f3d082581a97feb17d631e. 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/GX38U2380971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed45de3ecbcf1e177a7dac80e9b38249f198fe08917e837111520359ab5e2066. 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/GX38U2386626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9556649b58adce316d30d7263e1dd5c4252901138105580674c2d39dc5fdee8f. 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/GX8LE2337787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9df63ac1df0765bfbfea42a2f3c05f20cbd43cd96e7060bc3ce243fe66ef0dc. 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/GX89G2335832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c22a9c0c679a78adaf77a7385b40c6763667ece149d08ff4ea8266adc3adb7. 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/GX8LD2245503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ab7333072d06d333435c1bb1ef2d5667fab5ec0fbcbe06dca2b46bc42583fa. 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/GX8KD2224291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c6c5e0bc8c5395cf967119f0b2dcbe197ff019267e1e88190c38109a03ab53. 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/GX8KD2224283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35e1032254894e93fcd107d6de6ee370539298d24020583fa84c7dbd5519783. 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/GX3HH2206801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea6c3ebced7459148a2cd7354eb29f308854330281f9b3e2d9bf520ad30f49d. 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/GX3HH2206724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cc7e83ebb9d53140cdce48ec021fee06d624b6591405bd16b2695cbc9bb2f8. 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/GX5MY2102110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12348c88f2304e28740fd4891ff25fd2e77a36e05945d55252a401893120501. 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/GX5MX2105825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541bdac2b6a23e498cf847906a5cecb94a5a2ea6eeed81b0c75263de4eec8f80. 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/GX5MX2105857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587e6411d0c296b9c9f7fa06ebef29eccb777cfa1df9c40fe7ba5cc287364378. 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/GX4R52113140.