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 0xf6ef1480765ef94247d2d8e0335ad22f8587f6f5c1aa3590b5f66c0d099f63ff. 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/10fe6a12-7493-4795-b430-a69cf190b646.json and https://artists.proofprofile.net/proofs/artist/10fe6a12-7493-4795-b430-a69cf190b646.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 0xd77b3422854e170398d2933aad0a2d35435452416bdf7904c250c06bcff00e7a. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:06:06Z), 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/TCAID2463401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22381c0fef2092bca9233035382bd9f8ab3724600f8986d1f2eaadc714f9809d. 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/TCAIE2463504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d822020504f72bb21fe9afe93206bf527158b216b86b05e6fa4b316b03e31cd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAID2463547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0b7e2c12900285981a5b94dd874e769817da6b97f9ab6d2b925272777407c5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAIP2465099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93d50d4a037bbc03d765d474e89343d2545673f6d390e112be5520c8cedb9d7. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/TCAIQ2465187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bdaf4e6bd8ab0949c3bc684d2bdb75c2b3fc1230221f5d54051a7dd4eb6bbf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAIP2465236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96efc3bd991be575776bd3f8e295c9e8f27b2991a85e4e1a68fb199b06bad424. 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/TCAJG2581173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824562cc87f7efddc079c0d0375454dd9e7311e491454c11f5e2f6b762d9033f. 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/TCAJG2581314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a64e5759bf5031e2b78b443a577bceb6afa02846507a889409476db760358e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:19Z), 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/TCAJG2581363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dd0438ea7d85188cebefb55b080a1500213ca5569f3d52bd6833912cb6644f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAJG2581476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1c1f7d8b70605770b4603020e3fa72a7fb202c4270f1933892225217469347. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:51:09Z), 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/TCAJO2574966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd73d881b7069f309607174ab5e337a33e1e84a539fb67e7a1948cb1cd63ac9. 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/TCAJO2574933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fadffbbcbd67b4076f7713535c58f0a42b8b19e236ed2aad51fae704488cdb. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAJO2575007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6b97c70975128135c4d19ae80f726e4832c631a8563c8976ac73f3ab8ef691. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJO2575072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c7a85758638f8937162f74b4fbd330a05c2ca7c8cd417fc0db51eaa6127699. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCAJO2575016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cce836ead11771b51bb401a10175836958f2d5044a901787af70b13874cfc6d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:34:08Z), 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/TCAJQ2508815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898f1c433adab7764719dd7405d0cda615a88c9624e3d5b35e4414c727e305ea. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJP2508850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43297b8c4ef232203ab88f5a392d3b54e60de7846de415d15284b81fc02802b2. 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/TCAJP2508865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e25eb4186898a1f5832efdfecbabd9429065fe2ab0b5e05c3d73353d0e1b50. 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/TCAJP2508872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf236a7604d2650acefa85c75024e97d268f954caf4e9c5a0dd074453796f6195. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCAJQ2508880.