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 0xb6615fe49dce89d891b196100f7010c5ee3f4293125dacb2d19c89c2cc8b28ee. 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/dfdcc344-7ff1-4c99-8e9d-28f0ac7dd787.json and https://artists.proofprofile.net/proofs/artist/dfdcc344-7ff1-4c99-8e9d-28f0ac7dd787.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 0xd4e79a19b55b7bf4c845499d191e4406ad682f4da5fde3308cc1e147e5d68de3. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHZ42150933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a64f3a6fa26f68432ad27fae9c1e6d3b6531d6ea918e4f3bc41618029e81f38. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTVM2108239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e67c53886100da2912d330291cbba4571ba7433684f100ff72bee45ab0373f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZMZ92335948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506187fe6b9bea21fa663feb3c1dc5b804ec60fc503ed676073033f535c158e6. 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/BRQRX2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fbf356ae3447a0e3e4ae0f71c9dc150caed741f386b8de850493bd307cbe70. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BRQRX2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ad4b287d8d7fbee49ba35d2d09e72c79c68ae37b213df71ffbf488e9a760ea. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/BRQRX2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaff9659ba7a8dbe6ae6f47bc2c62a0f16f25bb7412d1cc5687f6dcc8b72727. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BRQRX2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e05610d908dfb790f4b3eee5977e678b3a48b6a6b21db20299276b8239d0936. 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/BRQRX2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4aa65a570a87f36721c720a279a83b22d74cd9d4db393d980b08ca55898d821. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/BRQRX2400005.
Amor ou Ex / Te Amo Demais / Cumbia de Amor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa185b6c3aae5949d212baad64e9f986165cf2401026d4b452a05332401866259. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZW9M2420616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e67c53886100da2912d330291cbba4571ba7433684f100ff72bee45ab0373f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZMZ92335948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fbf356ae3447a0e3e4ae0f71c9dc150caed741f386b8de850493bd307cbe70. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/BRQRX2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568a2342d5d890cd07f5574d7e064ee332cb78163e0479ec4bf9e5f4e96dff15. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZGLS2415013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaff9659ba7a8dbe6ae6f47bc2c62a0f16f25bb7412d1cc5687f6dcc8b72727. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/BRQRX2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4aa65a570a87f36721c720a279a83b22d74cd9d4db393d980b08ca55898d821. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/BRQRX2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e05610d908dfb790f4b3eee5977e678b3a48b6a6b21db20299276b8239d0936. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/BRQRX2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bedaf619c5db0bc5cbdcac54df238162dd98c3b20c3f420629c5fe21ff29553. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/BRQRX2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d928dcd40d4e61874fb6e4f9602e546122523783bd0abbf25b3ff18dc584f2. 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/BXIIY2300038.