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 0xa6ed4adac1f673f33a35512ceb27791b4e25672d770bf597c73be3350284fc1c. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/896b0fe0-b5c5-498a-be9f-4aa982325bca.json and https://artists.proofprofile.net/proofs/artist/896b0fe0-b5c5-498a-be9f-4aa982325bca.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 0x1ddc4e60f0b62e8c8a6aeac6b55f5bb11a4326d3064db5932364ca14a7bdf41e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX38U2586619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b56907cb0320fa8155d8eef0fb27fddc5c3a4ff0cf0900b881b854fc87cea96. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBSMU4104857.
Rap Contra El Racismo (with Sigiloh & Snuken)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61691d14e66614f389b76bd4551d6200397b396e1b74fc4bdf73b75999b80d34. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBSMU5983802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0def8902c087f99c2154009cbcad2a487a7e521b9b4388838a61bf6282de7d0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBSMU6318495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e861f750a82f8e9586218346711b67c0d23ac39dd1cb15226947854c48a554c. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/GBSMU7077467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1ee14e1b88a4475c918767569e1c47e92b205cbe257128d853d9f264e28918. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBSMU7548808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344b1a87e2ae1d50e10d08755b49eef5e94fb585218996d07034cd618dc37915. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXESV2447222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ef1496a40cfa970a347b61026e48764137b77078ff4ad0bf02b1c7bb72c30d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GX38U2144954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5255f2f3a0fa5dc07651140c7d07b1ce5cb054b4fe2374d75d129d3e47506a13. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GX4R52173156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddaf40040664222d2641388131ace09a412c254ea6faabd16557490c251f4ca. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/GX38U2204611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee29045837b811cc140562ffe20e7fa502248cdcb149d35945a3a6e9d26b712c. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/GX38U2204627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbf0990946eee5b36acca9c359298cab73e5e2da057c9f8baaf7a3b45945b00. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX8LD2238384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c5d9a1879f5261e88ce83ef232afd8813f0f7cfe46ad719823f7f0fe587776. 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/GX8LD2232519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb026dac107dd98f4b0cc432b5dc46df05adf0b01b54462462f35ea3af512ce7e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GX8LD2385899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14023f738b533c8b66be5e66b6b00d3743abe57ff3272e8984c6827072f24e39. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX53U2415638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf449eba7e051cc8a70bd428fe5cbcdd6ced98b2282b7a7cca1e3a124e47b817c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXBDS2528039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34778ab91518abe78a482cfc6fb15270e0ead994805f9c44751a97fc6fd5e4d5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GXBDS2573759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0137b548656a664064a60d9786c334250f5ee42137982aaa51f93f159e5e866. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX5MY2561066.