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 0x95b771214c4315d927585706a945d2922df33f9ac95b4370bf221218599348a5. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37ca03fc-cb8e-4896-9f6a-8c30451bc491.json and https://artists.proofprofile.net/proofs/artist/37ca03fc-cb8e-4896-9f6a-8c30451bc491.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 0xdfb0af0bb07ca7e14f1b833bc2f33f69926bdad22984981e0913670a2695dc55. 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/USUYG1005684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0011fedfdcebf3be7efcc89aefca61c1ef6d741474a1d6b566c41f3cfd7653. 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/USUYG1005685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182e35047fbd92b80356c5d0e52f4c952f8449e5f1ab3ab09cfc475027860b9e. 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/USUYG1005686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79945f5292f2feaea6569c0a7899a1826b3fe4eabb006401a8504e11b250c6a6. 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/USUYG1005687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723300bf0f38beff21a5cff87da0e63b86e4c3e9d6df2b649142bb5a5fcf7f9d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USUYG1005688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719a629389cbe4f9ffeed2a3ef8c1d8ba7730aa354ec239150a52d14dc1afc15. 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/USUYG1005689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15de7252b595e2ef5f09200c4d77e4cde031eb20cd9ed1e38dac07f89fca618d. 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/USUYG1005690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b91d441edef35df3bf116a24cd3100362a876c4a5f0678014178b0f3601d6a. 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/USUYG1005691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc994f643ad24ffbd4825e5a67ebc0d57b14605e75d7e0939df3e5cbd9fe098f0. 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/USUYG1005692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f33080719db4783c993badbbc115f21cda27e54136044ea71151e725851fa6. 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/USUYG1005693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203b24ac4d8c38913a19d8c9f3606350005525afe8add41af3c9585309ce5d12. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USUYG1005694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d008bd7a9466195b3ef7601ad1a38aeaa0e38695fa60ee205ca8416799ad2b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USUYG1005695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311ac951fcb3f54b1ab05ec59197c4385e0d47988e7ecbb66bba4b36be323af2. 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/USUYG1005696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd366a5fca4156797e962be9b147fd64414158d494030893ab600f2120b0fd52. 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/USUYG1005698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc20bf6f00c0cd5c16c65490806891760875f934ad37d60a7b88fd861d0c0b5. 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/USUYG1005699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8ffe288604a533dc987fae9a755f9ce52b09a340745de689b7a5cad84acccb. 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/USUYG1005700.
Bay Area Playas Vol.1 (The Ultimate Bay Area Rap Compilation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63341b85efca9d543407642368cc53662e3527233452e889682ded288b53ff1. 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/KRMIM2425446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dd312a7c756d6a25ab8fdd3369a4f7cd459d2cee2b20d65f8ca95dc0a53564. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA2P0709408.