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 0xea9335a0ed0fa058286ed67a081175085f57027ef193e7e57974acdcb34418d2. 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/d454c24d-79cb-45a8-b050-17eb646653ec.json and https://artists.proofprofile.net/proofs/artist/d454c24d-79cb-45a8-b050-17eb646653ec.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 0xaaaf6578143a3bc2cc4401b9a093e5810b5833ab45800887b1771ef405c545d8. 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/GBKQU2450620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a9622d0a2cfc150a3e04ee5dc2dab017aa0db06950725e87284fe4711e8d16. 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/GB8KE2512338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026cc0274fa487e250ca9772e1276a10a5621c836c5a8ac7f0fc8d73da811054. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z2517955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71d814d5fba1f3ff6b9a4b40c650401cf7b868f74b231acf528d36d3af4c473. 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/GB8KE2509548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbcc17da9485416c82ea7016552081256ea13df89f535525cc10bf7740b60e3. 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/GB8KE2508331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb65d9ab93a5fc8a9f4b7d244c253b6c59a9917a3ebbfd57b88c742a4738e727. 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/GB8KE2506284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353e9ecd40aff71f3b186ace288f5f63ed9aa7f2733288a78d5180b3d7f29186. 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/GB8KE2505858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66499bec6d18cc2a33dec0dfac2c45372eaa0b97ffb247ec4a2977ebfe7c87ca. 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/GB8KE2506010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dedb8fb26a2d61fdf17b0a17c65466678d5d1de750ad681268ce5184a58247e. 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/GB8KE2505847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a4a46655636660ef02757abf2718dfef1b4fb2dc499fcb9f8240c9a3bdcf3e. 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/GB8KE2504800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedf3d1ede84b91a0bff89b8056311bd0f964fd95e62d3bc2c2139a711bb44c5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US83Z2430031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f088a5b1ce27338589f2e1fc6d403109ba490a9abf20d32d10260ff88c7b375. 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/US83Z2494816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa577b96dad7d9c11471561f9d3fb17aaf3f991d6a8e9fab731f252ea10f173b3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US83Z2462825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdcaf28e5ef26d2160bd58306aefd8fa50715e80571fd015a03eab6b75aa8d2. 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/GBKQU2411491.