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 0xe879b2cd2e21a0bb3b0015c3906d747117f24a49a898d16e96d5b942f9bea77e. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b565d1d0-797e-4fc4-92fb-91491824ff8e.json and https://artists.proofprofile.net/proofs/artist/b565d1d0-797e-4fc4-92fb-91491824ff8e.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 0xe78d5bab86a48310c3345e291628b2aa22a023c22c7d8db3a500be347d34975e. 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/USDBB0608746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6a8c34760358a41ec68956f356873c1521ca2ee7770b306bf3aef32aa08623. 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/USDBB0609725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dd235c140c605d55fd41d80117491c222b10688a20aee136b11de1068534d6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDBB0610204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ec30402ff38703a4e3388d7d3d1014e01927e69c13302151893f9d0b468d3c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:29:07Z), 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/USDBB0608861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6878a9438cecabe73083a74b20298ad27a8e73803f270f252970d89277239862. 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/USDBB0608017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f95be2a3d239e4c7eed9a1102109142a43c63e024805926978e8e54bdb34dec. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USDBB0610238.
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 0x3f503a18cd078ba437598fd69f81698a1d1ce214edff05853c652d20da3c1b97. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDBB0609559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b15cf4b82b65b99c08e5c8ecc86af1ea8559e003b7c9cc789bdf882b0825b1. 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/USDBB0601102.
Cuando Vuelva A Tu Lado (What A Difference A Day Made)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e89d5b7d5cc2754d8eb32c43e9e03b6ba539db0f0abf1ab0d7abd10ef11f50. 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/USDBB0607200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e396d8e1e3d760b26b63f60a796893311f0fe0df220ac08ff4647f9a6843c6b. 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/USDBB0609705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7ae68bcb226160051da751b97941f8ecd7eaf9784aa7dab06a1dd9d0bb8c66. 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/USDBB0600778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491e8f49d038d092d1422dda871ff7e2351fa6b1071d6b3508233d587fe39911. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USDBB0606943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78231f2a7b755568b5da6b6ffc2cafec193135500d1a2fe2fd2f8960c1cffcf0. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USDBB0609391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcac14350dc3b16e0fff89ed0cdd6502a9ee4048a97a25e0967a083521805574. 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/USDBB0607122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ba6350c2f3b4368d653d375f9dec4172d173010717b72a8ede22c7f733e4cc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDBB0600901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7498c6c1f6084c832f414be3526cf8747e55596d15e1735dd877d3ffb35cd78b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDBB0607009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35bbe93c3c2edc46e0b2917bc68d5c12ace27abe4ee0359c5f9f314c248a522. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USDBB0600712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48168064e1cb29c78fd288d591bac9b89e7aeb132f06371d67f33e14ca90430. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USDBB0607320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e915cbafeb4d4c70777cb974dc825bd7935f4e7c9d045bc30d2b7395fa7a29. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USDBB0610229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a31be2f929d70b06e011f96e526d9be4da89fa0c21fef7e0623f72b88b6153c. 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/US78T0501084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b53f9997f5161d310bf7f7a3a0a5b8e23924acf929abe30f52096b594dd5b43. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/US78T0501078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096aeac473877043fb15c662e5f42bbd5abbce60d06f9818260f14e08ee9d14e. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/US78T0501079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b06e4264051ebf50e40696da04710d541f9790ad9ce856daff9c977dc2e54a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US78T0501080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9924af82019e871d288b06fda7a55b7ff2b6a71e0a302bc658cab64bc8565266. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US78T0501089.