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 0xbac2845c12b2f710e93f3159d1b07c2c7a2bffcd96fc7725a3eb12794069c5e7. 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/83c3f73a-c392-49fd-b84d-1220dbd95147.json and https://artists.proofprofile.net/proofs/artist/83c3f73a-c392-49fd-b84d-1220dbd95147.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 0xbc9e072f51f8699045aaed0b496dece73da15dac82ab266769fbba798277abc0. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/SE5Q52300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694ffd9f8a2bcea951c5248cd4da745af6decffb0b88f2b84391ea32f404929d. 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/SE5Q52003201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55425b14787d575f5703d43e409b0cba143552e8d60534a51a1cad9d76e9af8e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/SE5Q52003309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504f42f14d30d1e0f2edba52aec9309c5811d95a485864dac228a621b21d383e. 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/SE5Q52003311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3027c020cdc49d6f27adae6c198e702a5fcfaea4cf22ed8b2c83d3bc988130fa. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SE5Q52003307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbf4d5edf16991c9a86307fe35feac16f0f2a72441295ec7f8243a5ee17eda2. 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/SE5Q52003172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c043f8c19d6f292cdd979dcab75a8c3748776ddc09b255611176383e3267a37. 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/SE5Q51700813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833ac79cd751f5e02e62e362ba22df672e0f8fe98e7d7d32cf983508dc202dd3. 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/SE5Q51700814.
Epidemic Presents: Crates (Urien Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1573e32b11b57e2b2b64c34aa9a0d7ebfded228eb1482ecde26d2b6ef8d9532f. 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/SE5Q52001754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61829b4941e4abdf43c4f2fc564ad2f90788f0e7a439366237f2b80cf9d90efb. 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/SE5Q52001682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c56142c017ec0a1a76802d2094803539832082c0cf62a524da56c490c47762. 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/SE5Q51903918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c24757e484b52bb497ba3fef3a06119689efa32cc33e2d017732e4a2c9c9cdd. 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/SE5Q51904001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb921e3675552234a5b499666340c5f4e57bed86dec1a6b2e26bd966bda3ab84. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/SE5Q51904019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c7961f1bd910275961750db1f02d27af8f268135cfb05e344ac2faa6f9c5e3. 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/SE5Q51904109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e031841cd41ade4e8a4db9444b8a5b7aac55c9741b7448be6bcf307ac1409b. 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/SE5Q52000362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe807152a55a80072d181f9ea4960f78eb15f6adc714f1b0de58bd0a880f015e5. 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/SE5Q52001242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37690e87904cff5ec2e3da4183ac19b9f1d8776bdb316d5681ef95df9157842. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/SE5Q52000617.
Tell Me Now (Felix Johansson Carne Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8bffbaf328ec436ff56474bcbf61b1a34eca2773faf7af9fe11f5b0daca981. 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/SE5Q52001597.
Rainy Sunday (Felix Johansson Carne Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6546624007f7cc09fb5708b64e3048d20b5eef7fa6c69a3a8659f3f86e7ad3a. 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/SE5Q52002040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e3f8bc894c448ad81eab2662618f8ae17eb3607060d9bd0992672666498914. 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/SE5Q51700828.