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 0xd2cfd29fb85c03a506315bfdce379e454ac78c2d2869fc7d37ebc365f2b6b64b. 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/72860c71-ce70-4276-a7f6-0eae848c96f1.json and https://artists.proofprofile.net/proofs/artist/72860c71-ce70-4276-a7f6-0eae848c96f1.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 0xfb909ba3539af60e2650708ab048df17da357af07b202306183a3ccf1919f782. 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/TCAFU2187318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee9cd8bb8ad08d3f90ae9b086a60f79b6c3e026f440c5deb0148bca3d5323bc. 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/TCAFU2187342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6622ba4a9ad4df008dacadcdb4df3e86b7af96d8b35ed28725bcaf1ce654ad6. 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/TCAFU2187368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f673133924985b3286a79da1afbcad02c2b2e1b85f451fe9c77a3577c75422. 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/TCAFU2187481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53e124a68c7f3bb20f7caf22b7dba9e69146e9b99899f4df27aefc3bebf1ede. 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/TCAFU2187496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07162d7795c493f2cab642694c364a4353bf2b590fdbeaeda0ef0a7845921632. 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/TCAFU2187517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1458d2001946f67fcebeeeb4dc294079624f1efe5c6816b7afc0d00b94522eee. 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/TCAFU2187521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c70e650284f9b08758437d1032c86e7f9b581fd1b2b07ca5be35c486f0ebf10. 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/TCAFU2187537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6770b1e7a1a1cf04f8bca89668dff852c80e5e0438949589499a82c36f395d4b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ITB002301181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd74025751251eff6afae8d383014f48d277b6feec9e86e4d5256e6f9184d1cb. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/ITB002301243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebaef49348e178c91d36903b883728b19e7b7cfd63f1184cb18e303cdf1d2b3. 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/ITB002400711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebaef49348e178c91d36903b883728b19e7b7cfd63f1184cb18e303cdf1d2b3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ITB002400711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0f120e612f2a892f57758a734c54b2c09a0ab3919281833424a85777f4d5e1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITB002400739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f00e961bfcd9160871ecd08a190a82434f65228335128b32f1c4d070163c596. 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/ITB002200400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d38af21b6c3af0e62aca9ac3c8ade6eb44fa867663a8fd6e13495412b4762c. 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/ITB002200402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8558c2f7058d1ae8f57b96337bb9c64c8a60b022bd6ce9551dc4bcb1a11577e9. 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/ITB002200405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde784a5936a585b6f6e05496b6f68dacec37344a69a92eff4b5da86e7969208a. 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/ITB002200406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6868e3bbbb974d66f5d4f15f2b38fdc00f0d4b00cb6b604c08c00917c7d130a. 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/ITB002200407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9ea6ea681838cf3338d313ba6684c915e570694fbd3252c553d39e40c5e80b. 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/ITM382200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa564a57996a7bb30aff9d9f54f0cb4266c7649d0a9006d43f959b8410404948b. 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/ITZRF2400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df9dd79c17a92d6a4d91a96736e2b516e0f7a9336064d1a9ff197c356269a25. 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/FRX762416372.