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 0x2203a5113a4f898ecb587b6df34514cf94b205215f040e2917fbd7f8da79fb8a. 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/6ea7f376-dfb6-4062-b58c-22b3855b38b9.json and https://artists.proofprofile.net/proofs/artist/6ea7f376-dfb6-4062-b58c-22b3855b38b9.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 0x5c63655f39d7056e0ef235f5aa43ee52901a70197e667f39de890924be1be51b. 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/QZGLM2422655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740fd4cd15b2e6a57b5d59c0543a23006ecb5200b826c2b990a58829c76737e6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZGLM2422656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df8cb8d952d0ffc69f77ef3b600bba96a06b3c970c81501182e661b94b458c4. 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/QZGLM2422660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27dfd30890483b28a7a13aa8a6f785cbbb8140efab086119788fb72cafa3b81. 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/QZGLM2422662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43da3ce8abed766e7c41653627ce07a3edacf5f3bcf2d9a088807dc9e9f5143. 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/QZGLM2422663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e5bd1fdfc5e5d6e27af77346e4955d821f3dbf4c03200a1ad1e75754d0fec9. 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/QZHZ32124335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780890fe412d4d491d88053c5c4f15f930c0485607d0ac80647662155391e357. 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/QZHZ32124332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d7e2cdc9a2de401980bb68454fab6de527546569764db093adf5f6aa8d061a. 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/QZHZ32124339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a1cc74af8c085d0a34563a48b90421f00f5dc5d9591949c51da751868a67dd. 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/QZHZ32124330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45b7cc78f60295479017b5d3c61b0554dbc7539c85e7c0245e6df6cdf2f13fd. 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/QZHZ32124333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7061bf4ada5d2dd1192b272af6f66df2ce8a83885a95c1e160bc0b6ead0a28c. 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/QZHZ32124329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c44c81c81637c68cd6823392e78ea1bac5953cbdcd5fa235e8a2cff2a971817. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZHZ32123660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e03697105fcb25268131efa23602258fd94d0ddffd1dd8354a95f4e654342b. 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/QZHZ32123653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15b9ac3baeeef1789a4b28883801e1ad64f69f2034952be346404244c8025c9. 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/QZHZ32123662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c10b707bd755d597fc73c012e475685a7c255f541abe604dbf7ddde71c2781f. 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/QZHZ32123661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67157e7d90697ab819a2a0d33c1d682a6c6b5ba988098495c83021dc117b81eb. 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/QZHZ32123657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668a904d4b69ba4baf7cce5bb4357b78f9a8957871e4224ca11069e2ecf26ed1. 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/QZHZ32123649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b195c1c728cb65004296af76502f21100f0a1b01f9386ad5065e61f350d185. 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/QZHZ32123967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7c3f1476dda188eaeb38fa2ae8a0b579ea4d10eca04e71f20de9477c05b555. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHZ32123970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d8751145be376e72e688772c2a254c8917321f6381c116b601a38fdd2dd9c7. 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/QZHZ32123962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072caac4bd43123e094be5e926abb50d7561774daaae9a7bd48a822251d90667. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:26:52Z), 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/QZHZ32123971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6592f04de4579bebbe9c23b44191f9cd81405e0deddc731bcd57dc9b1bb3fb3. 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/QZHZ32123973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50881ff1feedde6e6d5612a8767c2793fbe08c4bf43746852a3b0ce0cc3442d. 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/QZHZ32123964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1a1b02c50231a17c6145d2f8097fc4034bd69f797472e5cd4340a48e2b3978. 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/QZHZ32123966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5645318cfa3eb1e361d2e6def54d3800001a88e6ae3347ac90c0c796f49a7af7. 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/QZHZ32124133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd45a37a032c39a5334f1d6c5aa97906be0b27d2e8e02ed49a66d9e5fb22d06f. 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/QZHZ32124142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b83456c912ee5d8f2d2a010e47f6f960d0c6c7c32c3f4b6329687dfa8b7f581. 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/QZNJV2221042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d8b55ebaa64e215cfd019a273eef17d20eca8d956acfc73924178f543af4f2. 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/USANG2242133.