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 0xa403468d277b6ebd6108c608f22bf152d78b096d9f6ccf5823f682c904f9017f. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c1b9b16-eb17-402c-b274-bfbb7cd81547.json and https://artists.proofprofile.net/proofs/artist/4c1b9b16-eb17-402c-b274-bfbb7cd81547.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 0xaa40f343adebd3f4f28b3f2f48278af78610947d2962e778e8e8c72545d8b5d0. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBBLY2201007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52872c51afd9aeb4303576427282db1099a3160c932b96d81e88c02223ed1cc. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBBLY2201008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93057ff258a771a33d9926ddd83910dc22e049a1157439b0282809b8fbc99fa4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBBLY2201009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb10dff20d3e8a6c220ca2061b2e74011a4e03ea666c4ac55936194477ca8a4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBBLY2201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af3332e0351f2d07bc92bd74544c1470fdaac0b52cadf8996e7cfc35cf9d5eb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBBLY2201011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579ca335c27a9879011a313d9ed9dd49f4581cf576cc28415fd49c8bc24d9917. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBBLY2201015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3eb499d7b1625897d890b316c6f9073958ee603b84b4c499ee60f99a95aa09. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBBLY2201016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfff403fbe8041f24146c14f24e69b689b93f26a882ddefa617fbcf88b2d2f10. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBBLY2201025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30bcf0707fac75a7b6e9c039fa060b6eab035b6e7e5bb35967f11a141dc982c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBBLY2201027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8bbd2b6cdae714b52d4434fc1501cbc66a153d9b5338e3a2580a584a68d2ae. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBBLY2201028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6453c2e2e0fd413de5173446b72859f7c66b0ca682b6d451cbfa7934314f562b. 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/GBBLY2201017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3bbc64cecbd159b245b718e3e35bb2f31f428ead8692127a047bb8b2ecdac2. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBBLY2201018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031df7052921d26a72a11a5c679c984bb0da985c623f809b554dceef3e7d1a0d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GBBLY2201019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4f9e8bf305c9148f11a93c37edee9f61bb1e8f465f955fbd8ad7f75113043b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBBLY2201020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5bed008e5bf78ac33fe96f1b287a9c3adf6b2eea411e73bae3e66faba1722b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBBLY2201021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7c26abf4aac305b016a3d6fdc6a6a664bcef137bcb213aac2c84d36cd764da. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/GBBLY2201022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c55cfb1e94446fe62219218f2fbddb60f0125c38a8ff758ae649c0c46fb5c7c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBBLY2201023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad24c885a85dfaf778723128f955635a72ab7b79a231ecf3dfb07fd36520f10f. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBBLY2201024.