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 0xed57efda172482a007291fd7c56c2cb899b3ba41a24c75e30b38bafdb45fe120. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2924d370-5b6b-45ba-b674-42b0b3e47c88.json and https://artists.proofprofile.net/proofs/artist/2924d370-5b6b-45ba-b674-42b0b3e47c88.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 0x20fcc4c2523cffe54c1c754d34b03b48f8dbf655971dad245132e2a1ba40ec9b. 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/QMPKX1721086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2371f2051087a0b4e7ede9f240d07826550128a6c258db5ecef681f67474b4ed. 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/QMPKX1721087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac18394572cb53a15aacf82a31ad5e4bdd13e566b7ce343f10257d40f49aeaa. 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/QMPKX1721088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2b2bf2603b7ba6ea45d639dc2c5292e00ac589914b6b76ea98c1e4100ae519. 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/QMPKX1721089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891867e522983b05995e8494e93615f6dca26774783def4f5623e251e695b927. 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/QMPKX1721090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d6d5e655a47e1c1e85f9cad6a29eb88592c4746b970ed0209731b1deba473c. 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/QMPKX1721091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66790dcfee52af2babfa797ef2f15ddd75fb2f5b4b429cf814e68cc91e98a7ef. 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/QMPKX1721092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce1b574c49a2e5104e24c05099de1e651e9ced9ff84ee21f1e4923bd1695beb. 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/QMPKX1721093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25165219b917857d2744f96ef76b50a0caaa08566ac9027c92225dcbdd1d8147. 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/QMPKX1721094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb910fee37224a4ab10b8a4d112581eb8e9d72a58894837a62eee1c0976af4190. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:26:54Z), 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/QMPKX1721095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2154efa772a8631fe909cd57bbba5530e1f71a732760364b16e16768fc258e36. 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/QMPKX1721096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0540f7ad4c48936488d818b17c2e0991faa2269614c5f3099ea4504dbd74ffd0. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZ4JJ1974936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57406afce0bdc243e302bb810186a3837d1a296bcc4212247e6469fbdf37173. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6M2501142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abfb7ac2bcc065e3b6fd027a1f4bacb6398676d826879d20ddc94d4fc98eb85. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T18:18:40Z), 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/QZK6M2501148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a1a94d80f9d33fc920b84813f4882a334c65a78cfdb753abd87af2f540d17f. 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/QZADU2215005.
Closed Eyes in a Dust Storm (Erothyme Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f0ab08279c1106fbb7fce7c06b467b71eec163f2e47f50446ac00632df17ab. 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/QZADU2215009.