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 0x49860d8810542686fb1734a28ccb4e4ad8738ed787d51357f43cb1ff1eb58b03. 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/18b9fa7b-f809-4bbe-91f4-4cf1c3abd07a.json and https://artists.proofprofile.net/proofs/artist/18b9fa7b-f809-4bbe-91f4-4cf1c3abd07a.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 0xfce778191765b27841e6e310c660a3cf3446e9100aa0885dbfb71499041b3267. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRACT1400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5c4090feb55ce3774169429ad3d58e0d8161b22c69b400df11cb9544b97dfb. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BRACT1400217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46733ec1c3149d2ddb2936d4fc84e789370ea8939e8162f6eec1d94324899700. 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/BRACT1000172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827c8e7956c46c52c22bafacd49ef4ac20b7c0d30520b51e8986b133a56682ea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRACT1000178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0d548a234488c03f1dc1cdb135b1cee2a44f2683d31ab47417fa830a484c4d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRACT1000182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde565a85d2667923c28ae99ba79cf0605c400a4dc06339abb492732073a679b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BRACT1000171.
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 0xd91ad76abba692becebfce3f43f2ee725df6d91c8b5dd4f27074647b896edae8. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BRACT1000173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1815250d4b5e5ee95dce4b6abc821773df1e9f878b7d75225b8229c271474f2. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BRACT1000174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2289e6848ddf37288a91e48df775bdc42860691c27aad03af932831bd09122bb. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BRACT1000175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837356f41565186508ed1325da41a1fde532e6385e92a53f4f7a56a666a73ca6. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/BRACT1000176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c8930fbb4662e64e65d7d6800248b0d253c2884f261d4071d208fe0b41b4ab. 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/BRACT1000177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde20df538964cb5f5a6ad3d523b9831f4219206d358e8fdd1aad3645537da042. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BRACT1000179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1558e9de80e5e1bb1b88449644337384f38ffb438aea2f9d6b35cdbf608287cf. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRACT1000180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722b599ad8aee30ddeed0c2c78e6332b7859e6ed5eb3ba736bc5b27b46f8447b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BRACT1000181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd818e4f44c7f21f65d3ca9d353e79510a5092b6074e813af1a2b35dbb760820b. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BRACT1000183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f22f2c32f4e60d521767fc46217a91926a279a9ab54ea1d8d5967de41a7ef15. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRACT1000184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa60022637acc6f9d54cd1d1c44510ed0db08e6c9ffb52d5f63c74f1950706b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRACT0701393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79443cd676621270f16a7291a7b84e5e478bf38422bf627bbaa1edf3de2ed6e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZ5AB2362813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b62c1c4e10a09c71dead065519c9611a4736cfebd50b111feb4d5c051a261e5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ5AB2362814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d95a1c1b9876a5c276818c95e0a70125eb87e87b50f17a466771631c4f3f00. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZ5AB2362816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb830185da2f1817c18990bee5866a9037cb21e901709aa2490348699b27abd42. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZ5AB2362825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30138818affc8d6101812afa98bb59001d46324edef307f0f87a0699453bc78b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ5AB2362826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfee4af73e84ff4c001ff1c8b593703d660e4074ed4dec73b5034dc0296e6922. 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/BRACT1600600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9620ba73e943da27f7d153a1209255e925d18ce65238b79d95ae3d4174af0476. 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/BRACT0400189.