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 0x40e235248f3c424800c8913e4318eda18c9283c0385060cf7683017457d3219b. 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/0928e185-b1e2-4098-86c3-8936d0764d5f.json and https://artists.proofprofile.net/proofs/artist/0928e185-b1e2-4098-86c3-8936d0764d5f.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 0x5461d1395c58f89d6b453e73fcf09807a0bc6ee165c004240787ceb71d86661c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMPKX1477891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5695256ce68c75823679947c4fc9165e82eea256ad5cbccd078b38a6a8542b4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMPKX1322811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c8d751114161dcb09a4989283cd89233c5fe183728c47935fdda112fe5c5c0. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QMPKX1320869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd601f7c46a058d29f738476201786fb081a0b76540ba4a84a9481ed27859f803. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMPKX1314560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0d064d97fd8611fd5927954de2b705a7cd8f9910208d2d0e5703e6f094738f. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QM4DW1679176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045ecbb39afb9032962de7fbcd06842949249c32b582cf2cec24a06f471cb119. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZ9Y21756570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f47752ca98ff02394d6297889b82928ecdd16d1bdf08a55884d93dad4b07573. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZBRF1802993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e85847b864d2e17d93034fc2d65f84a511e322a9a18e4c8e4231a9c4bdb57e3. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:41:16Z), 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/QZ4JJ1740701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf89b5a2538d3055b4984964c333ff60012df25e7ffc37d894141ed39876e902. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN42020779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0513744171b515de0f0aa497ad53f5aa9167ddc8187e136a8b730f487c273a42. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ72050956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfaedf0d4168dad34dcbf9ab864fbb18fc501ec187a724764356c7417f51bf6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZES92343371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1701b299117e2dd8afb054e19aa6354c43bed3b38b3e8748e57a66e597ba99ce. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:42:03Z), 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/QZDA82310408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6907de2a94f82125cd2316eb4493128121633850b05671dfc80ba13d64917fc9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA82310348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d824ec1893c4ccc81c55d1e180d6e3d7456316439ecf0ecb3ad2e348e44de6e. 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/QZWDE2366111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d824ec1893c4ccc81c55d1e180d6e3d7456316439ecf0ecb3ad2e348e44de6e. 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/QZWDE2366111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597d86a59c22da830f967b26f6f164e8e5baae0132312a9fdae89dfdd6253230. 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/QZK6K2478257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597d86a59c22da830f967b26f6f164e8e5baae0132312a9fdae89dfdd6253230. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6K2478257.
Beat Saber (Original Game Soundtrack), Vol.VI
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808bda81660b26ad66306153c56a138bf2b0f3f5b4f08ff426e85e9349d42203. 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/QZWFL2396552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34615865ff33bbba56599e97a585532649f9ccbe9e6f6d87d77ec5bdfd9519b2. 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/QZTAW2506868.