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 0xfe306c13c47b1f5a3dc22d00c744090ca9b752990f3656d9572188c7b1735b06. 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/5d9791ac-fae6-4faf-a752-73312590e6ef.json and https://artists.proofprofile.net/proofs/artist/5d9791ac-fae6-4faf-a752-73312590e6ef.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 0xaf5aa75218aceb1745331af59bebbed5ffeec59e57a4cb414104e991627b22eb. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/BX1ST1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2f0569cf866b3a6802272f608b86b4b8db4869882defb0b5b727d422572d30. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BX1ST1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63f700c2b44bcc61e6e8e45ac84a6cc63d0cac5f597ffa20c2be0e7b33f01d9. 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/BX1ST1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fc3561fbd170f51aa5491e07cea997da625d3754ada2e4bd01e080d19adee1. 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/BX1ST1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941a87f583e61ca031b7f52616f5e49c06d073cabf8bc7636de43f0aca4f176c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:58:04Z), 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/BX1ST1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59cc5cadf14e301c07071fcb3f3ab67bcca94c0ba00fd4608b0a2379d6017cd. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:46:26Z), 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/BX1ST1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132a7e20d238d9392492e4a1203c4d7d19964b41e296ac12ae34c34dc1150ea1. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/BX1ST1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4f3452de05d8d37f297c238cb9c64fe70a16409d31ebb613e61ebe731d4bee. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BX1ST1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa91df01e8470132ae9adccc440f803ffb1450559481871bc88c94f9aca4b331. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BX1ST1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1d75f2f33d79c312bff980464bcae04f377eda18603a749015ea32c4bbba90. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BX1ST1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbf9870e368b83b504edd19a96af41b50bfbead7590b056bfa2d83cb0947605. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:10:02Z), 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/BX1ST1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d021646f0da32448328443c729ef6e6239a165849a94cc597621ebd59b32401. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BX1ST1700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3b48e5394c63e173c7d54d757dfe3b2b5410fd74819fa2e1012d1923182c40. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BX1ST1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2436e01ce08b0a44a683cae49626a344139b6742948baa00bab7f0c0e233997e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/BX1ST1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9462589379a2bb726d6ce75ed86c3b79150314e8c9565846f2fd5aa40678859a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BX1ST1700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93dfc1a084e72dd6a1f05f3b56679d3d50b85bddb12b4d3b39737fbe411b187. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BX1ST1700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138d85c6ff17515a85752b91705d69d3ac511673fd8ee0c257a5316c90c10d78. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BX1ST1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff6cf83281c0c82b07599dc8f4f517834f5e59a96047dc85dd6d2026541c017. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:57:42Z), 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/BX1ST1700021.