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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6203540e1df73ece663101d89c158e97962c24e0e993b0fa3bba9d70f3abc612. 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/9dd181c2-3549-4b08-9839-7138972b7f3d.json and https://artists.proofprofile.net/proofs/artist/9dd181c2-3549-4b08-9839-7138972b7f3d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb0226cad9b275bcf8edd97ebd3c215949c6933cd72f4741108174ce372f570. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TRUM72200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9949a50880280ab0f6a2ae298e76cfb13c27d15ffc9b35ccb53a3fd0413ce45b. 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/TRUM72200769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75972f2699386d484306e61e526f14517e0b895d2a221225e4c34c20b8abd4a5. 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/TRUM72200830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254e42f8c75774fb8d9f99ee4ba060810bff8836990dcb83c191dfa00016cabc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TRUM72300453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bf51b6dd2793c3d1869d6d20e07a11dcc01ce2e5afda82981f1c63e87f19cd. 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/TRUM72300818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc64810f9840312451cb558f46de29d5265ffc7738496dac76971d2884cc1154. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TRUM72400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd580a34f8cafe9626232dfaa770c0d52d313fba666072d8cc50bb8c0fc9a33f4. 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/TRUM72400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5172b7b898a4468f3db633e2613ec5b59cc6971855d90fa635ea039666cf5cb7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TRUM72400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48825229b89e69332f1ea8fe954366c7cdd2309975fad110b9c91526ef987cd. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TRUM72300621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254e42f8c75774fb8d9f99ee4ba060810bff8836990dcb83c191dfa00016cabc. 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/TRUM72300453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf395856722e69475845deae9027ca7788df635a3cf6f9dd07a86a0b5732b5a5c. 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/TRUM72400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a052625fc7d43ea9e80cdfbc6d3ac10631883084c023164ef924fd9bbf6d2e4. 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/TRUM72400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1c2f44786962ec4feabc5e15b37a15bd919b0b33cb6151c1971c2581474fb2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TRUM72400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cadd10d6d6e8999386e0356e54d4e90d96528ef807424544be5866e439eb256. 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/TRUM72400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cadd10d6d6e8999386e0356e54d4e90d96528ef807424544be5866e439eb256. 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/TRUM72400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cadd10d6d6e8999386e0356e54d4e90d96528ef807424544be5866e439eb256. 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/TRUM72400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54dca3a181eb5c3a86ab7901f3a0c1a672e3328679cff82f259b0690f47afc9. 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/QMBZ92332722.