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 0x9dbf4cc1aa3fa97ccec3b84bd6147a6362737a717f1cca5e19046546e6fd9cc3. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a597d10-71f0-477b-b9f7-b6c48ae1c663.json and https://artists.proofprofile.net/proofs/artist/7a597d10-71f0-477b-b9f7-b6c48ae1c663.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 0xdb50878b1c325e20b5d0b44baf95dd593672ec8ec7a94ff583885edf2888a6cc. 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/GBVPL1800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f9d73f94e3bce19c6645800541feedc97cca70cdb75d7cacf4461d42acd8a7. 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/GBVPL2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8503506417472cfca481f097170891da2c5bf99a4e827c7031a7042e29b1eff7. 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/GBVPL2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5f8f41e0a4f7e76753057a488fd7e68ce967536e308b932db9bbfedd1ecaf7. 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/GBVPL2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78723457ef1c62e03959ba771c9ae0f9abe9ce311e7963abe5fdc392a932d481. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBVPL2000028.
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 0xab35ba4b84fec289ad4d5043e7d3777910d5efb48759aadc1ca1ed30f1f785de. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBVPL2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5adfb59129e42f73e9bcc49e974d4dc86d680a193383a52648ca4a21856b86. 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/GBVPL1900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f56605fd2a83f95bdd631f953fa71746fda6396acd733be527ca8b163a6d169. 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/GBVPL1900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9028314226680bc4dd627bd1189c7938b980b3ec47814619188d94ddd90c64b6. 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/GBVPL1900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e33a5dbd3ff109659ca76e407d113829202f36e75daad10b4226c7057b495cf. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBVPL1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb20e5240e808b294a4dd3eb587fd13f7bc83a1421ebcebb7a344b3b4adc5a4. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBVPL1900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b902acff44c76ab34b4379eba526f3de3d28c0af821cc0456f95a99bcd7799. 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/GBVPL1900019.
Together (IMANU / Signal Remix) / Sizzle Fizzle (Circuits Rewire)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c04fb5e57c546e5a67f3e0ef1c0a163bf2df9553af5909bcb00c7503234203d. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/UKACT1830611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2549807ef62ff7b2ca68c6d056e75b73bf59c3652bbeb189a14f9c9e9b826d6d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/UKACT1830612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1ee4de12b9bd235ea2cd9c39c0476c5b5e676048272883020b6c88c089752b. 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/GBVPL1800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92e489f5b3651ac358e95b2cb5277cc6987a7345557de3adb26e7c20e30a737. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBVPL1800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f30a8e41af3311a4f0fce48c86b673030493eb34be1bd6f84b7d34db96ecca5. 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/GBVPL1800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c36043967da98feafed62d18002fbaac7e08b2d2a4d6d3125973a516a5981be. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBVPL1800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f30e5e9902d10faf84ff5ffc8a5d5ce46de25b0e9e7a1287f3ad5e712d99a4. 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/GBVPL1800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde47cc80691508aeb920c1d895615d3d188c0810fdb67c20533ef524be9d084a. 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/GBCJY2000158.