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 0x7f9cac8c7c4730a0c171098e6574d26161d6b019dbb2a4c31aba2dfcc4bc7fdf. 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/ddc63d15-3c7c-460b-b733-9bc5e887bf20.json and https://artists.proofprofile.net/proofs/artist/ddc63d15-3c7c-460b-b733-9bc5e887bf20.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 0x0be1bc9223325a7023062311b0dedf74ea03994c8f36f52b45423c890a4a9b59. 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/PLA552300672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418e202ab72e27017cec94dce47d4d1856a58aa6b2ab1f1481199042daeddf20. 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/PLW771816613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee329b151170fdd18036ddb6528d99fcfcd7f9ed7f5d6339cf0f89aa20ef4586. 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/PLW771814412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf588637c04ef0a366c155986f8f9845c469c97fac806f6451030bcb828da4ca5. 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/PLV402001078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10a1d0dd6f6cba77f06d44aed287f420d8dad88cab06862e6cd8a28bec132bc. 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/PLX632000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40345a2dbcb7c52b6274d9a479dd12d35f3778a5c7b9f82bc25065c76845f7dd. 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/PLW771816612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aef4c4daa32ff1e54cd6de0fa35bca37cf0cf8e632e979c9f1625f5207c21d5. 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/PLW771732451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12cd74c0387e063653182d8d61833a5d4f557b7e039216a76d56f52b114dd95. 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/PLW771716163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b10b37f69e0cb7ca03e9f88fc0331b4f56877646d4345317b1cfff345da27f. 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/USCGH1715821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12ff74518a62deca7fabd90fba129c5a27a2ee1c1df8f973dcfe5d31190c359. 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/PLH181600642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afe65be64a622763dadf44cfdeb075694b0fa2f8277d2b4fa39275ef7ef910d. 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/PL2DY2400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292e70a15d9ed946b4e0ee0e7b4cd3f48542d3c389c715bb0eb3bea28cc53c6f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/PLH181600685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10a1d0dd6f6cba77f06d44aed287f420d8dad88cab06862e6cd8a28bec132bc. 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/PLX632000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84883f7be20f01c4661785dc75bf4edd7e949aa925f0fe54addf9ee3f257caa. 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/PLH181600668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8ad3554d2aeb2aee16f4c75a0773798b0143110533f22ea10c0d0e0543ed96. 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/PLH181500529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bc081c246536ec68ef45f53ad345a9d9dd0299f69a446fa99dd68d651c5764. 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/PLX631700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8725889ad29254340f463998e29e8532b842585244bf8f53836169654a0d30. 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/PLB382400858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393b678ff03d9f68b98598de80831a160365465ad8c48f093385a65861cbe838. 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/PLS282100175.