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 0x26c36fbb25fafa771b64dc1b0ad6e874f8abebc90230d0a4467173148650f067. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6ec7cfd-32ec-4b46-b97e-8307123eb3da.json and https://artists.proofprofile.net/proofs/artist/c6ec7cfd-32ec-4b46-b97e-8307123eb3da.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 0x985fdc3aebcc21349193565a033ca8f4d418d3d7d999673f74180041e5fd98e6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:39:01Z), 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/TWA330304601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9fa69ee6eb7268bb80f1a9017e480dfd91c1f3a47ec1f33f78d44a88b38eba. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TWA330304610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce252cf434cea9b1a4c5f6ed52716db709cde70ffccb352514066f20706de5b6. 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/TWA330304602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29369232349e137c36f0381959b266fc04fe11f0341eca70e733c828f174d7d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TWA330304702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea425d27723c9448c46cdd31fa7c432eb12a9e9a0fcbcfb48d5def305959e69. 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/TWA330303601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd73c0d9111b3e105e814c8705e8879b82c8bf15750a0d2f6102ca91a9cf5cc. 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/TWA330303607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c404436c33cb08438a4b39a7c003f04a0b835c9c525e71a086fe7a40abe7652. 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/TWA330303611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26c3d3598121ef4b4250c7ff9f75db6d98abf4fc462f457545beae94d4f4334. 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/TWA330303614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e8b2187d9b2cad30dc9c22a26394286502f67cec16cd39de7d7badab413a2c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TWA330304807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d9668660728cdb7e1ab00becc76673d24280cd9c787eeac71f8bda2fbd8efa. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TWA330303702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf272014a4cf78799bba2313822dbdd9303b5e4150d3a7cb18ff5f0350c8f3522. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TWA330303701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce252cf434cea9b1a4c5f6ed52716db709cde70ffccb352514066f20706de5b6. 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/TWA330304602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390f86dc05cc59a4e02e8771fa5ba2f167f877be8361b2623dc9a36c54ea5e02. 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/TWA330304603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9719849a7ea80a2ad3d192c85a19bfe99c2573ea472508be6e83c7cb51643d9d. 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/TWA330304604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a5807045432b80642926b0760cfc6893b02c4585d17e0bd08e024a45636305. 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/TWA330304605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b410701abd38d96210abb5630a9ffa9b39045975bba807d6ebf07e3040c0a7c. 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/TWA330304606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01a3f28a229430a828594bdb375a0c6c56b5bc32e958d502d9e67075f020075. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TWA330304608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9fa69ee6eb7268bb80f1a9017e480dfd91c1f3a47ec1f33f78d44a88b38eba. 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/TWA330304610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0a8649f81228c50fd115959fe0f53f8a96b0519304a96244ef33ccfc88ab5f. 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/TWA330304701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29369232349e137c36f0381959b266fc04fe11f0341eca70e733c828f174d7d. 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/TWA330304702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba681140a79770616bdb953e4dabbfec6d68b628d8c0162a6b9e652a1779f60. 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/TWA330304708.