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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 0x2fc50f41789c0c8199ed75e3a611057ad48233774203cadde1b196d275d97773. 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/34d03c93-cf1d-4cc7-b08d-4ab163b3b45a.json and https://artists.proofprofile.net/proofs/artist/34d03c93-cf1d-4cc7-b08d-4ab163b3b45a.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 0xaf082fce9044943c56cc73c23a24b032ab9ce26c98b704755f35f3db8ea8b3eb. 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/GBDHC2017811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a7ae32962548e6570dd298baa69b0f3f45866d376361128169abac0d9e3ac0. 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/FR2X41575419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe06a2cf90d292878e72dc5a6c7c786ae42119343b9a2ecd04042a9e253062b9. 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/GBDHC2227207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376c2d742c8b90b425c07783f790124ddb10e31d58a705f1360b095ab203ea50. 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/GBDHC2227202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6a9115fab0d1149ec694da019738407bba7efe756a4e7ddec14c923d8d97d2. 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/GBDHC2227201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761f648d5e1cac6c79b56b63c046bc257a7df2a9d2ffc509f76770c814a25000. 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/GBDHC2227206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4442b507209ce4b060369dea5061b2250188a111f5347f1f65d9ae6848aa01. 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/GBDHC2227208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285f02daaae7324c2bdca239fc891fbf739d799bc7ed4a60e4e3c64e1e6fd7d5. 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/GBDHC2227209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44813308b91fcd228fb370f8101782b31d4b0fb827863cc372d5929f5639b3b0. 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/GBDHC2227210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6026e642a49cdd4de0a47ab39f8c1f70e41eeaf07df53fe55749a9077b974c40. 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/GBDHC2227211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf13f92df7c9f58908443d661e9a96fba8de42ba02644df49bb128e6f9ab762e. 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/GBDHC2227212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f729f088126508eba44f9e6832cfdc9c42f0d71670708dd5b8beaa52d1b4c4. 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/GBDHC2227214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376c2d742c8b90b425c07783f790124ddb10e31d58a705f1360b095ab203ea50. 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/GBDHC2227202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6a9115fab0d1149ec694da019738407bba7efe756a4e7ddec14c923d8d97d2. 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/GBDHC2227201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe06a2cf90d292878e72dc5a6c7c786ae42119343b9a2ecd04042a9e253062b9. 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/GBDHC2227207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761f648d5e1cac6c79b56b63c046bc257a7df2a9d2ffc509f76770c814a25000. 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/GBDHC2227206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4442b507209ce4b060369dea5061b2250188a111f5347f1f65d9ae6848aa01. 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/GBDHC2227208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285f02daaae7324c2bdca239fc891fbf739d799bc7ed4a60e4e3c64e1e6fd7d5. 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/GBDHC2227209.