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 0x8ad848c8ec18ee14da2704fb2aef3ecc5fdfac876fc7f9d339a50e53f80f5b33. 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/ba72da61-7c3a-4656-821b-2cd37786f82c.json and https://artists.proofprofile.net/proofs/artist/ba72da61-7c3a-4656-821b-2cd37786f82c.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 0x9f4199a3b266001c822f08facce4813ada95bb6505dee92b96f8f308163f1984. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/BXAT61800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf100e938ee88959c6e1c831c27c873218002485d886ba685ec3ead3bc98821c. 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/GX3Q92148441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7238710926ed2a39e6a69248dc2db07a55566500fa533f77e19bd8883de40f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GBLFP2297933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335633e9900bc4bf99f1b9b0dd7acb4df0bf0aa63770eca64e179b32a638de48. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZNWZ2220499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba5c6b236b20db06691c68d51b0ee227d6380d09c5a97e6c28f38a55223046e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRUM72201709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59feca76fb9b7050f6c947c38cdd4907c13c48aee2d77f72847073ca09b7c4db. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SGB502265139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf095960654d0dc1df1bfd8fc39ec366276831b4040d6888de2539418640659b8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX4IU2304226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f4d4a4dbb9a6833d0bae49c70c45555ab1d15fdbf5cec2bff144f3c8398839. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES92589766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ae196367798758e494e4c262c37de6019ba09d491d9f933aaa9bfa1b34b9f0. 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/CACWV2530088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569c54dde2910d4e044bc03816a3f358ebc09062cf15134c15bc65a6f70727bc. 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/BKBEM2401186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec32ecd20f44efae8fe3cd079e9be95265699e6cf2890e60a8e94cae6092a4b. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/BKBEM2401174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e345104e38c8dc526c35f608cc5f65637b5430cb7409ae26634b92aea31a6f. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/CA5KR2319467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176fb57026804ea1f29a1824f053fa21038e34d8564e5f8d10a8246360193d56. 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/QZ5FN2113027.
Alma de Cigana - Remix (feat. Slow Sense)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc067291deac8229b8b5ea52d33cf4723abe02d1ec3a7c66b4a537ed04f4f271d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX18R2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa06b7af225e5b5402e35fab7053a9370d4977c464a41a346732fdb761d69965. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXIED2100159.