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 0xd9f0a0c6e92fd134aa810322efce74a21e39ff8fc32a916fab02f7f18eb1dd62. 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/4e134531-ae77-4b13-88f3-43931fa08418.json and https://artists.proofprofile.net/proofs/artist/4e134531-ae77-4b13-88f3-43931fa08418.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 0x065b6a6f39db42bf48870a36bafbb626a89fbc4cfe1f928888c64c0f9c86100a. 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/USAT22100996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75d86408bc22d9757e2c29468a4b7f91a3903afe8f9f0be5a34fff4a6772898. 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/USAT22103172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5fd3fab329120b21b3ecdf534700fcacbf58b67cd62cbd7bb1b68498e2a5b8. 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/USAT22103175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6f2147889be16d3cafd9a79bf0f260e28399c3b3f9685d7c46f43fdf08e725. 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/USAT22103178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddceaa77648094070a444370ab3eb08d4499949275e1e86caa08918190157b57. 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/USAT22103181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadaa4be5ec6f9e35e5cbc9137484331defb7625494c2450a3cc8eb279a4e4d1. 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/USAT22103184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c70b2cac129c15a928b953df562168728c6dc2d4fc6fbd9616b31365baf8c2. 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/USAT22103187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dd19e951c21fb598de0e1e18d4fdb30494baba735b723f0e5b47de853533c5. 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/USAT22004480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7a554b33083c0f0eaa1c667d545433b27a26fdf0694bb4e9e1604bd44261b5. 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/USAT22103190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28ada22f5ae8a00efee46dbe1ada93a20ae83d859713b29b5482e19de6a77bd. 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/USAT22005779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce045446a59b76ebd01219491467afeaf191b2a6614a0342e522a078ab54825. 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/USAT22103193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508d51c58def24ef6f576f262d45f45e0a623e97a92b4182611268e235935b18. 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/USAT22103199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a0397be490cde462cf57545bf175989ad400b4523f20e864bc4a82ba4e951b. 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/USAT22103213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ddd2395991a32b2c71e63327967a3c05cbe05fa2fc5c0349ac6f17d6051708. 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/USAT22101561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88c68121a72c92d3af9fac32a07fb2ea6249da78c6820412b6fc352b1f8a652. 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/USAT22103196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91173f1df4fe0342c875c15bf65edb766c2d65350dd2402bc531d0a2c182a3b. 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/USAT22200738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ddd2395991a32b2c71e63327967a3c05cbe05fa2fc5c0349ac6f17d6051708. 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/USAT22101561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065b6a6f39db42bf48870a36bafbb626a89fbc4cfe1f928888c64c0f9c86100a. 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/USAT22100996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065b6a6f39db42bf48870a36bafbb626a89fbc4cfe1f928888c64c0f9c86100a. 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/USAT22100996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28ada22f5ae8a00efee46dbe1ada93a20ae83d859713b29b5482e19de6a77bd. 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/USAT22005779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28ada22f5ae8a00efee46dbe1ada93a20ae83d859713b29b5482e19de6a77bd. 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/USAT22005779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dd19e951c21fb598de0e1e18d4fdb30494baba735b723f0e5b47de853533c5. 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/USAT22004480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133e33eb2512b95b95757c63d8c43c692c9662664fc49069a480878d726e6ef9. 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/USAT22004114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dd19e951c21fb598de0e1e18d4fdb30494baba735b723f0e5b47de853533c5. 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/USAT22004480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91173f1df4fe0342c875c15bf65edb766c2d65350dd2402bc531d0a2c182a3b. 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/USAT22200738.