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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 0xabae4be8c8a883356c93811b08cc6ef978c016ebf4f8c6e10a07666469fa5601. 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/23ace5dc-29ec-45b4-991b-436612fce400.json and https://artists.proofprofile.net/proofs/artist/23ace5dc-29ec-45b4-991b-436612fce400.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 0x53a1498b1c02051ccfe1a3f7b02d921610bb81fa4700a7d59b2b252817497d12. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/PLV401900440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a6769d256dbebbd5e488037c5f19a2b9319d78f9ef68bed3f0684858d31457. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/PLV401900441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934b771e188299587b802a629c8053928d1cb7f44f366687866ddda2dfe2343f. 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/PLV401900442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19b5ba8c1a34b98a5ea54e30b52e13ed31c47d73aae1f030981d3543a7666b3. 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/PLV401900408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9817c61648a6f7f4402bef789e07aebcbaee3a1150c59dd550f4cb9133f5e19. 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/PLV402301545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097c657121f06da4b53459e1b721cfd5c8c276a34c0e5410eb3395145b81dae3. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/PLV401900445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60571f05a62649b6ed59682a7fb73a002383b141cc8cbe90d57c0703a7c272a1. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/PLV401900446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4f2c023c7202ec95d33fe551adaa2e544fbdeb49e881b9095c9a824f2a84c0. 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/PLV401900447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35b6cdf047e7594853adef5505159724ff3e736b26d6fc4a9d2294f4a89b86b. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/PLV401900448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b792bec228e7a70c939becd23de31eae95008f8b7ccbf8356c0656dc703678. 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/PLV401900449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d385f01818aedd7dc4d7e4fec5f24724c12b45a5a509785908a40b37e1431e. 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/PLV401900450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77020f4ab303c5d5a6f4c32090922b1d799403d5ebe992e81180fdef7a55eeff. 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/PLV401900451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa394417d2a0c2811e0d18af646bb05d2e3bd4cc49ed4622b9625dfd9dda39f42. 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/PLC062417669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f426e6ba2425fb497d643bb1fb9f622d64d3276abaf3c28872bfd6a5515fdde. 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/PLV401700232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf402c39772ff28dcc744a4eccb3d3e2670dc4543b8da057856598c8197d93d6a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/PLS711800302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20efebda327bbab5cc9bc48b6ea7f639a8cf1cfd921f46e57bebf0e9afe55d59. 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/PLT611800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebde765cdacd5f3f5c3d05f4bf378eb54615371584c8263cc5c46a047b112584. 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/PLV401700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabada160506a4e897914b0fc716f20c27c5e08c84ce27f45aa70d61dea67b8cd. 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/PL2DY2302052.