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 0xe3e807d44035c20519f67455c9344b1ef325c8f51fafb9169bd56032489e58cb. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82a66647-1418-4c8b-a3f5-728c03732a34.json and https://artists.proofprofile.net/proofs/artist/82a66647-1418-4c8b-a3f5-728c03732a34.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 0x7e61e69c7c3888d7425925bf1160ddfa6cb9c3f958a14c51cbf5053e63d38f42. 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/SE5752489532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aec96d72d4b4cb44cb7f06ad4e67ec5625d306e333851a17e6af54c3fa546a1. 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/SE5752489533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1dfb94644a92ac6efb13360e79163bb27dd85764d527bd79d59dc272404fe52. 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/SE5752489534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07874ba9efb0a3808acec16b3aa3202df1598d8fc45e37ef95818c1e2e791f3. 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/SE5752489536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8507ab13a1a3466672a59a829d6400b99934bf10650cb3214b446f8111588be6. 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/SE5752407558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4548603f320e06c6f1ce6bbce162c48d0eeec7b5e9281cfd7ad04b7de0bcda1b. 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/SE5752429735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f395d7ffb5148b0d49e2066cafa5882c3c39dbf7428dbe4bbfdf4e384d077d. 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/SE5752429736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81a569b6781dc4937518fa9059606e6665e12996043a6efd3d0b4ade1741c2d. 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/SE5752429737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf00157834bb9658941f3a1438a965037c8005c329da17a7d60b59ca1bad95ae. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE5752429739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6c28bca337f67e96b35c54283a478204726d9aa0771ae35737a91fd635106b. 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/SE5752429741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a5734410460e5387b9c7e2ff5b7f838a81be884892415dba977f3066775a59. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:42:53Z), 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/SE5752429738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d803915790c54be76fa2403e3155050a03e8ce46ec819df91d4912a70ec786c. 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/NL2J92403287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce4eb6d8b00aef1c1769847a8cfea1d978693e969696510a3eb4acabc275b45. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/NL2J92402181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5da167039f6b3cac5087a16058490c2f42d85d37e5257d59abab8b7eee2ed49. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NL2J92401833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8507ab13a1a3466672a59a829d6400b99934bf10650cb3214b446f8111588be6. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SE5752407558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f96ce2524d022431fb1a75c779c6a8f28889564755d96f22d6f6c3d54b0e7e. 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/SE5BU2457352.