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 0x4bb94fe8af24bb409762ba70f5e5376bb686a56fe6cc184594ec10a6805d17c5. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cbf7e44-223b-4f6f-9e8e-c05c0f2826b9.json and https://artists.proofprofile.net/proofs/artist/7cbf7e44-223b-4f6f-9e8e-c05c0f2826b9.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 0x106fa227de73f6cd6b330ba0e7e9a0657dbaa94e1c1e006a91b1ebacb3acd274. 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/USI4R0917800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c78ad9ca5e424f273950caea863e1edf0a02d7ec5e280069a475f55e1ff2d7a. 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/USI4R0917801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a937760318cc176403d8d089b17a40cb01ae502fe841175be8adb6315e2b834. 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/USI4R0917802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d3e7e6967a20d06f098523f1b655e5c0ff880fab535a018edebb6ac896e71e. 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/USI4R0917803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bfa8f37fee955272121722b3d222a391d16c353ae2fbb7dd9b4b91f91ac613. 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/USI4R0917804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc75a01e44ae833e336436d825089d576d644da79f73dd6c1df106e98578a0bc. 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/USI4R0917805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80d12a03b168d93eac4d67a7ed17a07a60da32f4a9a952e9a95ed62420f6074. 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/USI4R0917806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36d5be23f0e11c376f85073000580d9e1913937150dd05280bbe339877d82c7. 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/USI4R0917807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44afd2342ec2837d8bfe63145a15e707087d19aa55dd71bcd1b2db1864d71894. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USI4R0917808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47717f414057ebf4dc128218e90d8f85d602c72825c1495d23e5d6ae526db963. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USI4R0917809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf584fb5377bda3bf11b973e4404655a8bc0dcafceebb85974fc05c50ebcf2442. 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/USI4R0917810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b5672d3270ea397f0b00e90158018494f868bc361153b94e4b0518e8990bc6. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USI4R0917811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c30e24758008a9890ce5aa478eb229a7ef2fdb7447ec86db1559b199d5f2387. 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/USI4R0917812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c69bc00040bc147ed939b96773cc5e2e22b594133a9772553a050509741e8e8. 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/USI4R0917813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff318407ba0f8d36d0be02ea0dca8e1b53548723b2c9ab1de7f521ddb9f63412. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USI4R0917815.
King Makers Presents: The Cool Ambient Experience
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf584fb5377bda3bf11b973e4404655a8bc0dcafceebb85974fc05c50ebcf2442. 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/USI4R0917810.