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 0x5b9ea052b0562f780da4a474915858f31f63f66283c45561c20c43ae6015ff4e. 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/a747c9d0-e896-4aa0-bff1-c6cb2be57226.json and https://artists.proofprofile.net/proofs/artist/a747c9d0-e896-4aa0-bff1-c6cb2be57226.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 0x75ccb1bde311c45abb7880d6d6dd59be9da3bec6c19ebc20d36163a0d1c22f94. 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/NLRD52220457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e3c8580745f06054eb8c9af64cc8f30e70c762a46759eafd82692eda805744. 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/NLRD52220458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3fbe68808c1006c788e20daf9bf31d5567cfc4b2765f3827f3bc1897f3726b. 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/NLRD52220454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3fbe68808c1006c788e20daf9bf31d5567cfc4b2765f3827f3bc1897f3726b. 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/NLRD52220454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2719d1c0c9f58ea1efb990dad09cd52f3548dd4ee441b0354b7a36aec15ab577. 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/NLRD52220414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0248ea47962a5bb74c35be23f69bf5372704e29180fbad6db1197c58d6beb9. 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/NLRD52220452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0248ea47962a5bb74c35be23f69bf5372704e29180fbad6db1197c58d6beb9. 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/NLRD52220452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbaf136950a76fb8f8a3de0e7157e30e6dad08735e9573b7e254c91f71ca57d. 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/NLRD52220417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2719d1c0c9f58ea1efb990dad09cd52f3548dd4ee441b0354b7a36aec15ab577. 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/NLRD52220414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a451970c83d31e929bf1ba6a0c98690e5971237089b4c0dd6dc2aadf6c108c9. 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/NLRD52119971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7a80f1c2ee899e93ae3674684a92f01539f2000dd2f8be5c37262c52103a4a. 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/NLRD52119968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8943dd469489833475350005b55dafdfcf2182791c772184203a018cf5f9730f. 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/USHM22119294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9c1a509832c88d828f13a2e5566f913cd947b7a22f5ccae2e9466fb78e3dba. 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/QZKDK2090424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152c8286d3603316e2d9fcc98b248e570ec3fd4cb08a18fd226f1f3aa07d02b7. 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/USCGJ2151024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9383853954e4152b79d32cf1da86ff027afbb467a21533fd96cfc87a5b361bea. 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/USHM22119299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152c8286d3603316e2d9fcc98b248e570ec3fd4cb08a18fd226f1f3aa07d02b7. 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/USCGJ2151024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef6a5ed6c8fd0009156d48a96334b1f0b5ac3362b158d024955be3562e5ebff. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:03:56Z), 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/CA5KR2115451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9c1a509832c88d828f13a2e5566f913cd947b7a22f5ccae2e9466fb78e3dba. 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/QZKDK2090424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc788237eb3e84cfb0f78f1224bdac7b7f7ce2ee3efd585639a8ff70fa6156b75. 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/CA5KR2040984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e4b7ea69ccf22c09fcb58d94d27c0c9090a24e0e746a54dbba112b161e6749. 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/CA5KR2000458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef52e5ea561a502c28495a2a88344b3d1f9f3d70219a6e5aec6d439ef73087e8. 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/CA5KR2000461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94b060d1057a58e5dd5620eade31c4bd5cec8a44ff8671e8ab0929a1dab7f1a. 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/CAKDD1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907b92d3f1c167de5c3b2eb171fe7b779230b2421e4fcfb62369ae68bb9ab143. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAKDD1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8849464f99c5c68e90af05f61578e7c36b39ed0c3eda8077f7cdba222e2d377a. 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/CAKDD1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94b060d1057a58e5dd5620eade31c4bd5cec8a44ff8671e8ab0929a1dab7f1a. 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/CAKDD1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b92441fbd82628a03fdda394fb3b928cce6ded7fe67d7e1f6c21d9dfd701b69. 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/USHM81892950.