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 0x9b69b4542d20278a9bafb05857b27d562064f6d22dc156b51978612e259d1c65. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd517f85-ee74-4f31-83bc-0b363d59429e.json and https://artists.proofprofile.net/proofs/artist/fd517f85-ee74-4f31-83bc-0b363d59429e.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 0xa1c36f87d8ae534fe85541c2dc2a5c5086792a630bbdf7be553017dc95c89340. 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/CAF661600320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0301fd9b74df7674192855240dbd6949bdaf200462466f79a7598187d96cef0. 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/CAF661600221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccde4ac45c8288c32ff89b9bd05fe2ac2a0d1963b1e85d92d439be7251c7c26. 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/CAF661600321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4933930d8a65eec499453d6ef889471f0e209d5263a76f145f6e006d87bb093. 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/CAF661600322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd94ad1444343461bdc595ba4f48a2a081de18d3047b478529bdca178620474. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/CAF661600323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376f2809c785a2057b1d5021d55e158643f90bbca4134916bed763735b14a2f3. 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/CAF661600324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf3f9b5ced63a38b84a04b028864c4f4ab866d09a39be2295b8691d0528c30f. 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/CAF661600326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb4cbad9196c441972f406979ead7c160434d5cc85113d31683c9ab3d254d8c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAF661600328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcdf805547160e3ee28bcec2d2b1c14ec2867da4e13f24883a0b143f1ff4b29. 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/CAE861810001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54b0166e2b4fd0e3d9d03d7d6efe608a6fa8c5acef631c1f7bd5c4a510144b9. 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/CAE861810002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b5984659d7a8fa1c299cec7d7c87159d45408b7f395767fd4be935fa8091e2. 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/CAE861810003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc875acb74154934d5dafdff4ecf1bac5ed376a35165cc25693353dfcdf51f0. 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/CAE861810004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7e73d38946ab14166c089a302d0d3db0a468a9bfce90657acab00d99fecc43. 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/CAE861800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0464cc51453f0a5ce4b03b2cc76ba5d783f4632438a92dcd9d60b537bf3af946. 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/CAE861810005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6b611df385ce9e04ff6c87d442f83b3bb40b0f5536f22815d270c164e0d6f5. 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/CAE861810006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cce7395473bd5426a7458b70540c1b20cf824965f99575e733d0a618c46b7e. 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/CAE861800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9fd6ca176ff366bf95978496115def6c82a38d600b19a6299ede93b9489d80. 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/CAE861810007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416304963f3a179603143a312bca36fa2a01a19cdeb6fbbbacd64446fe9457ae. 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/CAE861810008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa648596f59e7f883c68ea1dd8256e623b26e55ba96bf99d7944b43f771c18265. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAE861810009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55a70f87e786399bbabc223ae1cd98332e59d70489babc890a162b73545b48f. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CAE861800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db10b0d644f98158e9e17a8fd223dd593e0111ed59935da3d62afc4f1ae5743. 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/CAE861810011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7e73d38946ab14166c089a302d0d3db0a468a9bfce90657acab00d99fecc43. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAE861800001.