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 0x7665c3e802d9d6c831885ae2afe96ee1bf3d894e451db2585582ae074aeedccc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7323f102-0e87-49da-854e-01f21b416f0f.json and https://artists.proofprofile.net/proofs/artist/7323f102-0e87-49da-854e-01f21b416f0f.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 0x99924c7e1ef031cbf4ecac6c4729be3c524d68c1106ea1af5de89d0267b758f6. 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/SE6HN2416934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96deb0b348cb263aa65a1fee06ecd9ce20a3478da926dae896a7ae4d93883fdb. 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/SE6HN2416935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7585c38361988e0ee827f4eed938d7adc8bc8e601d5cef2f0585b79b8bf67ec. 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/SE6HN2416936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b50cfefee58e9d4a888ae998f05ec4395f2c21e2412401fbf0409ade2ece718. 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/SE6I32488669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acc1a8209dc2b6cd137b30884f8c6fa70a8b575e8ff8b1de57927615ea4dddb. 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/SE6HN2416937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6896a02279f1735de017bf60d96b767a7885ac0ddd9029108987e483fc8d748. 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/SE5752457181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acc1a8209dc2b6cd137b30884f8c6fa70a8b575e8ff8b1de57927615ea4dddb. 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/SE6HN2416937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6896a02279f1735de017bf60d96b767a7885ac0ddd9029108987e483fc8d748. 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/SE5752457181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b50cfefee58e9d4a888ae998f05ec4395f2c21e2412401fbf0409ade2ece718. 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/SE6I32488669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606a8905ed06b82ba8e3b7d64d127e8c70efce6ddb1be5d68ed753bb6d4ec216. 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/SE62M2279304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4067707875e463dc74affd7cb039b02a8cc7d9ba8c47dcc8a8688807c35c495. 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/SE6SA2332254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00d053f264949eb8ae10d852e56b8dd92a4cfe2bc09ccf4bfd91f402bf7471b. 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/SE5BU2327584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5adc741893ae3bcf9c18b1aee5a72cc6c9113fe8e5ffc53eacc23e4603a325b. 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/SE6XW2215969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0611e0dd2b747b9de188bab2e4dcec8f477bd76e7feb0c7053b3563ba9f6ef6. 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/SE6XX2250564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b010c7056f74cf9de7716c7bb6f138dfd24aefb19d175000e44e1ab5788af42. 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/SE6XX2250565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f5c675218d75b01baef69bfd728271d5f74a6ae2cd2340d16c01ffb43dfb32. 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/SE6I32273208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba584ba48c89d58ec363b31374432b786a91b7e77edf67c05f20b5524213087e. 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/SE5752275876.