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 0xa12263eb2ad016ec060e30325802bdd5f1705aeffef5731c62dfc44b595434c5. Chain 2 (Bitcoin): anchored in block 954010 (2026-06-16T21:41:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33d22fbd-9788-45a5-9e29-4ec2cbd37d0d.json and https://artists.proofprofile.net/proofs/artist/33d22fbd-9788-45a5-9e29-4ec2cbd37d0d.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 0x1a4f29692d0136451247f3169996146dd57164bd8c91538fc1fc16bc3f5d066a. 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/SEWYF2240001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0770df1448c06a417e3342494b9becbcef4f77780000cea8645860da8f21691. 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/SEWYF2240002.
You're Gonna Make Me Lonesome When You Go
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd564cc43bdafa9ef32481e04577dfce8b41e23a169c57a6af4920d4482a04343. 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/SEBAA2001401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb47857ad8769a3fdb06f05785b2a7a63cb6976eaec38dedd0924e8800551d12. 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/SEBAA2001402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cf410689d54abc164b91f18e325a239fe83a3cf05378ab74b63c9a1fa8a471. 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/SEBAA2001404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d730256d95c2c1c08f4a3fb8e49c62b15fcba3ae3d71871f3cf0977db5f58a4. 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/SEBAA2001405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6a5e893f19471958821c69ed8da3b357c6f517156cb13ac81a6e86c783df00. 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/SEBAA2001407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb6e06a1afe064afdfba1339e32b8cbf4f9b37d79e76c71e531326333830712. 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/SEVVF2401402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118a716d6f8dc000ed909a1a23f67cd3da88e7d24d9ba14dbe1142f318b8b375. 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/SEVVF2401403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa669344369ae3cf79c1a5a4246e7ce6fc85ed52914a7ddb52be2914fd3665a10. 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/SEVVF2401405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc1219d4a86341561a870913cb59911008f73b3237c42f4d9ff264b849b27f7. 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/SEVVF2401404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1a3173c414c034162ccded28c3b34b40024d11f6eba00abd70f9e160cc8b5e. 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/SEVVF2401407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9278171e7064bc9c11a316ffbc430625ddb1fdfc49932a5a83e7fe9d87f94e61. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:57:14Z), 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/SEVVF2300502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5d950b09f237293722aa39ae50070868c16ee4b3c067e958e12277fe8b9f14. 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/SEVVF2300503.