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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87a162c63ec2ec8de761ef90926e093ce6fdfcb15c2566888e1970f635b7790. 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/b675f45d-64f1-4f0c-b09e-d0c3612e7d6d.json and https://artists.proofprofile.net/proofs/artist/b675f45d-64f1-4f0c-b09e-d0c3612e7d6d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759bcab32d1706f891234265f147145559fdd5ccca5bc7b7cc004e2111866742. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEN2301569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbff15d95229ceae60cdbde49807c6b6a2a55a8c43241763c81305afb97eb58. 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/QZMEN2301589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759bcab32d1706f891234265f147145559fdd5ccca5bc7b7cc004e2111866742. 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/QZMEN2301569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eae9bcbeb15178fdc53ef47901af1dbf651441ffb6c7700001453402832b30d. 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/QZNWW2369201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbff15d95229ceae60cdbde49807c6b6a2a55a8c43241763c81305afb97eb58. 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/QZMEN2301589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92abb7855b152ecf1548b4e1b6478a1bcd637da0d6ca9b1ce17c011c499f89d0. 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/QZNWW2369202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2079cdb4be7b0ab73f8aad5b4004c4515e6b6d08541eb0b97711508ac5d57f. 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/QZNWW2369203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bf8398654df1c6e2a03b68244beadf8d71db20d241026516806b08c0c726ea. 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/QZNWW2369204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa76cf8c52e05cf44a63a66b1d42f272c98e1b2b4286eea26404d08273288f2. 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/QZNWW2369205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc4288e35f2811c9ff3be21d94e2dbee61201da8f0f79c7655aa235d98e7e49. 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/QZNWW2369206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f0d29a649f9c66cd033ec336452997e20bf2cf47a7d3c2bfe4a2918e34d96b. 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/QZNWW2369207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf268e7fd02c0eead34e3d8491b98eee2631a70b97c23b57346971830a1bc5ad. 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/QZNWW2369208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c27491d9c06356e3e2ed7713039e4809cf788b882979093da59270b778e6468. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMER2433926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe318c68061f8a12a25997dbbb243674013d2b0063cc2061e0575f45ca4685673. 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/TCAHH2371268.