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 0xd4a367ee5c1c290dbd557a78147767702dd4cd69e0529318b475427a026fc18a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/379b7bf1-df9f-4003-aa3e-8d4d89a41219.json and https://artists.proofprofile.net/proofs/artist/379b7bf1-df9f-4003-aa3e-8d4d89a41219.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 0x2e587c11cc8919dfbab03c5e74129c2de6a7aca5dc4edfc242b8d048d5fc238e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES21S2000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571b1762be499118f4bda54d1370f6bc7081a1d69d18b36763f95386ada1135e. 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/ES21S2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a675a4ad2d5ee454eecd905c40386a0b30f285a5161fd7a3078c43accc312e. 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/ES21S2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5f4e8159c832dd777ae8a1a8d812bb410c67c6fa856cddbfacd0728691d02d. 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/ES21S2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa46e5f3a78585132cd6b6b18f5da715142530ba75b79c024e106796f93fd3a. 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/ES21S2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818f5809bdc61dd673ad1ba23a3c8dd8ee5a5681874cf5af24e39ac3da109179. 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/ES21S2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc718c2ddee09410b14670054dff191e58899e9d14bc284526e4a558c637a5f9d. 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/ES21S2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5673e9f02f18176152de4706efb1a5e022c8d870efde8696f59f2813723883. 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/ES21S2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608f552fa455e533a0d61cf4021330f29b17e142fe8883e79190d0fc971af5fe. 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/ES21S2000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e587c11cc8919dfbab03c5e74129c2de6a7aca5dc4edfc242b8d048d5fc238e. 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/ES21S2000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ca7facda6ccdabbe4e49c6629a83f4971f0a4070f9d04167eb68ee24d00e4a. 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/ES21S2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4778929cbb0208d973ab0c911d9c55116875cebd0d44346bd2f85caaacfeb4cf. 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/ES21S2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571b1762be499118f4bda54d1370f6bc7081a1d69d18b36763f95386ada1135e. 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/ES21S2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f54176287f1d45b5abbb5013ac6450be8cde3f70153317bc4ba711a86db108. 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/ES21S2100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511d27f9c9517826f9f8b32f23118c3908e946325b1b6acc1321e94d11875c80. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:03:10Z), 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/ES21S2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22fffb2bb017176187b5ebea60a8defb95393db52623899e6b5c54025ad17df. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES21S2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627663199294d3fb2c8b3e2afad6f53fdb0bec26a0fdf0bf673dd36c6c90dc3e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES21S2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301e8cb8f747a3ca93a37ffc2914ac1d357e1e8f176a6200bf94b9399110449c. 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/DGA052483409.