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 0x03962e3683a30044af0c4795bf58134f90a632d376dc0512562aa2c0a2df0f38. 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/9e1c2698-2a0b-46b4-9ac8-596f45b57a4c.json and https://artists.proofprofile.net/proofs/artist/9e1c2698-2a0b-46b4-9ac8-596f45b57a4c.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 0x978665198a62bb194852994545c02cc6f03d1f4abb9db4013bfd19a194ab532c. 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/BC3PG2401552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb8e629ee77999e1462b815aa73b6c158156920b9c0ddf6a50f443ba3033a06. 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/BC3PG2331262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41db4c22e70cfe34e79276e6e96bd9fa0062f9e61b9387f07da08889f8afc504. 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/BC3PG2304060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9261cfef3b10e16b795f6e66e3e22dc27035b1e062f56bf05bd2b6459dd310. 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/BC3PG2303986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f170ec70fae138493cba15ba1c8644cb53e9275020768c307a942d2b74e072. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK2242401383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb422f84a9a7d9778aea0e85320b5e9cd6cb1a1a94396555ed569d415cd1a57dc. 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/BK2242401154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5a0fc83d70a06fc428115fa9c75d8afda1893b900a76e28c22ff299e5f72b6. 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/BC3PG2305573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24c8d3d2e8e0448d73f839f6c6234d79ff9503c6e3632087b6c916697b84229. 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/BC3PG2400871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d86e9d0d89551bcc485e7be39adab1d325657854714d22691cdc8f9f244307. 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/BC3PG2400175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5bf8210a96547b4663637e8d99f76d7cf24237c5ef34d10d27456aadb29ef8. 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/BC3PG2330964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ad1a90d232aae0bda45090c3a6027dd04e65d4acf21e5d712e8e88d3540c51. 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/BC3PG2330962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac3cd077665c518e3987fb3fe4df6a2e5b54f69416d04a3d06afaf8c4e887ef. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BC3PG2330976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7c98abd8a8381fff22b64eb968a2649adfec3fb773ccc170c836b03928753b. 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/BC3PG2330963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fafe3b8f59bcb63f130109444e080437bc212a5940b118aa70ccbd04425f4c. 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/BC3PG2330973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054a3035779ecf299265e247ca203b55d3aac32920c6616eacaa0c28954f59a0. 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/BC3PG2306808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d6f3e36a4c7f41981c8f8a2db4396c19891624340c735a31daaf7415d0af6d. 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/BC3PG2305296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6203e7d1ba6a13aa38117d07738657a5e8dfb8a285a7f47252f768ebf8362b8. 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/BC3PG2305323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce84221ac513e7402af7ac908fc147d032763d49cbc58cf687114c73bdf9893d. 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/BC3PG2305212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e27b9713db48d6a073dc7e02b290a8a758de06f3d550659d314235da2a6d278. 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/BKBSS2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37df5daaa73f2acc76dc6471be19fdfbd5caf561ca64fcc87a0ea609e6dcb32b. 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/BC3PG2303800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854711fde52ad390f4ca672b015ab08c3be9f1ced43c65a2cfec102c8c45a97f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BC3PG2304463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2201abb5158199f96d03f0b2843a2700c4e71018c6e133dbd786a8eecab29c19. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BC3PG2303689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42b626d75a6f947251dc947a4aca5a95cce4df63d6fb57a10896d7544fe8816. 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/BC3PG2304101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6633d384af713e1cd8a24deae1e8a0d219f316edbe2afc9088f886ad884efd52. 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/BC3PG2303245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b080ba61ab2963e0c64748f991e8a15d74ca04e0bed38c5ffe6ad55c04b0ddf. 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/QZGLM2318927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b642281449b54f88a92c0f6d6966d00b8cf140d1d99efc55deb271407b5d73. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BC3PG2303235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb229a0653191b755f736b3111effc613cff46dddeaa53cedd84fc34359c484f7. 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/QZW9N2233831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2400b458102eab74571f87f00758bb14c848004edf08daa89babed89495f023d. 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/US3DF2263800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daff1a2462f70689610789b7d1e57cb9a0398b4efebd4dbb4e86c91888f4450. 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/QM3DF2144749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e28b8b72f997116f54ec1b2e32c4a1640d1ac4a10eb00cdff597cafc17aba7. 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/US3DF2198125.