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 0x2f4317791b13f0bf8454e1e29cdea92e3121cf3104b7cdfbe128c97ccdc0c220. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b144e57-9e5f-4f96-99eb-9c3648d58af1.json and https://artists.proofprofile.net/proofs/artist/0b144e57-9e5f-4f96-99eb-9c3648d58af1.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 0xbe42336fba456cacf400ea5f646486d76eb58df6dec3caedfe24de2e5541c7c7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BXV3Z2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe79e16feb2d3862f591a9040f40b979da90e046c0a17bffa0e55c0e9c1f12cd. 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/BXV3Z2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ad4811572090177ab063a1fadd4a4339d99e164f5501ae7d6df8ee1f055475. 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/BXV3Z2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ef6d1f9887bf2b057b724e4197085ef50f87bc96d50f02fd328dcedcc55df1. 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/BXV3Z2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc85a94709f2080917b870d6d9433a9c72539b55b6d2094938a16a7ba7b27a8. 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/BXV3Z2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88a9f7af889fd876c7a62989263614f5208ac452ea1dac2ada2fb376ca5a00d. 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/BXV3Z2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959b79a71f39d280227d15b21f94382e111628072a947dec65f645b5be01f76c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/BXV3Z2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dff626fd5aeaf16c17f16edb2dc7640850943d7779c7f963bc1519e6e4b864. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/BXV3Z2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4215c7e8ccd58f4c05a1a75168ab642d8e6446030d348453de09774563b0106e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BXV3Z2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdeddc630e59af67b1d6524183aa56836fccd9e865610596d3f3d854b31dd95e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BXV3Z2500006.
Cantos Populares do Brasil de Elsie Houston
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c6308879414655cc71802979af7ec85b9faf57acd15ce8381b416a70755343. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BXRNA1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ab90abcc6c0b1ebf2f916aeaf4c11659fc96819c8efecd345e9ce2ec22e0c7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BXRNA1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c7591de6505f6de307835fa8a9488c41f62f62bc400e137b534c1a866ffbe1. 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/BRV542300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432a418a5246d04ef36050de568c0a62a1641a657869fa8fe73f07de96238565. 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/BRV542300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419847ef433a2277b61966ed4f4bfb0bf29a5c9dec4cb4125fe27a7f5043b7ec. 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/BXJB52000003.