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 0xa4316f2fa38e91066622d6c34b41005ee811f93e6ebe9194bb934e8dd2f065c0. 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/3a0a0082-830c-42f8-99cc-05dd5eea9e70.json and https://artists.proofprofile.net/proofs/artist/3a0a0082-830c-42f8-99cc-05dd5eea9e70.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 0xe62cf96e6ba1f9323eb8e6413cb309b4749e1c892ca2b73a34c1dcf206e2bb7e. 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/NLZ541900751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37eb866a61fb32fdc325bd39a0510d37b4cb012df7c1c86182f60e6dde8a411e. 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/BCSOR2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddb4c2da565f22b08bf295e430fa10745a4c0d1260b36f02a13d589f07e6df4. 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/BXBRU2000008.
Bass House Anthems: Best of 2019 (Presented by Spinnin' Records)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62cf96e6ba1f9323eb8e6413cb309b4749e1c892ca2b73a34c1dcf206e2bb7e. 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/NLZ541900751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dd99e66b26819cb7ca6c497cb2d1d77a7d63ced139bfe4806c5d565d6ae676. 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/BXKZM2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f069baf772896b7918e6e620a2c316823c2c4193742f91b774bc139ab39c978. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/US7VG1671506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ae3e2abd93be952726c6e395e5ea2cd1b178cf929596e0e8cf55ea1d89b75e. 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/BXKG22302014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671940ce32c878c712917c66bf0d3aa6a9ba792be5c31c4da3d54a8090550a8b. 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/BXG6R2300453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2108ad95f91e75eea342d17b8ee51d09500c8bbb4f340adbf276dcd501b48bb. 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/BRRGE1813861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299f9deef2198cc1b1b2bac02cb88499a70623349b618bbfd6ecd0625a5ef2bb. 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/BXG6R2200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fe7b60d74290322332144afdc8545f4ad2e0981dea3612b0b05bb5e506c427. 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/BKTBX2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cf0644fcdce7c332d5d362a16f478d12d47a1d627b072d823df8dab6dca5e1. 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/BCSOR2500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9947823fe9a27e04e62631621f9b83f0cc7e89c91ad6b344841a723057742777. 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/BXG6R2400492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd509be76eb2debc0a8790ecf73ede45946cd996632a27cc662b69eaab783ea46. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BXKG22302659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42272c6e81cdf50985bf87de5552cdf1849061a0f1e8c88cb85e84eb8329815. 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/BCSOR2500070.