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 0xb4bae43603bcb104851a33935ea1149fc86e25a426b5eb1f6ca065ee69bb0573. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41130f88-8f67-4966-8b73-6d0c7eaaa755.json and https://artists.proofprofile.net/proofs/artist/41130f88-8f67-4966-8b73-6d0c7eaaa755.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 0xe16537b77f4e3c450ec14792cdbdb6f723afb054e1bcf3d7a70da3f25092a091. 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/DERN42200252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e78118ad61351408a0ebcf57c0e31fa0f804241bfa9c128c82be9651464f20. 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/DETO32100473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a06c759c38ccf3892649194a151735087e4cd8102b848566a0f9abd9be183c. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEM932000901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd916ad4a3a9ed2e412191a961214c51dfab19e6727cb06f3b1c071caa3c2049a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USATE1711903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c9d09bdb78c8dc96e7db66c167b1b174f492c556b9edcf57982b2bda4873bc. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DERN42200171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61973196ee6d8caf28ff2926438d9117ee47173e4169243423ca32077018469f. 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/GBENL1902423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8daee759bc568cefe981edf1da75dbbfbe7487a45d9e0da1b0c5a445827b7f. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DERN42200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a7537dbc4e17ed7825596a6319f14f87cfce12912c6d7ab8fa6249cc18ebdd. 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/DEW872108558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c10dc129cb1b6daa10fe7a142c9642d698c5a4def588eefc1ea3391da10cc3. 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/US2252134501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145dbce8d07ab465a1a0b6778d228ad1dd5387e6a96841e3ccb0d17113f61985. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEW872109617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1ae79f3f090c54ed0b11fc73c1234e177d910b9025c3525657a5e2ad67f77f. 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/GBJAJ1400669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fd9b1f778a46417df33e2e9fe26038c0f4b80e93d04640102ebc3b3b3551f1. 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/DEW871808249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428d7586f022706eeb77af45ff22aea82863dfe5d6645f520dcdd5b3b7925a51. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FRX201639336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b10f506a65ae83bcb624d8af1633cc935f4f206a3953932b8998bd40c20de30. 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/FRX201639338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35362354811fac8292343e0ddf6bf536a78fa9318cb0696fe03dbe498678cf38. 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/FR59R1687341.
Deep & Sweet Vol.1 (Best of Deep House Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa63e733859aa5f87d5a3ecf6234f9ff035854fc8916db3e96857e9427db424. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/UKACT1912148.
Deep & Sweet Vol.2: Best of Deep House Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35362354811fac8292343e0ddf6bf536a78fa9318cb0696fe03dbe498678cf38. 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/FR59R1687341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5f12511effd971ac979b255dc25df320ecfad5bf3395b00feb02714430aafb. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FR59R1687342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d19fdb236d6600ec06fc2c83def8eee626fa9a3d096d89a65976af6e8bed08c. 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/FR59R1687343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf587b226027365972a1de7f8f5b92a0f24a9085dc2769ae66e3b529e95689707. 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/FR59R1687344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847e8a77f7d8219be95d464c6e589b6c751226ea009d37fdcbdc539ae7ce7c7b. 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/FR59R1687345.