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 0x4d37161c9001b4183fda2ad912c62f8cdc1c20b0da472be22f69200bd6938543. 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/daff225a-0d5b-4f19-bf59-8923649a3b00.json and https://artists.proofprofile.net/proofs/artist/daff225a-0d5b-4f19-bf59-8923649a3b00.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 0x4497b909a1698db33c2f46ec053c5cb68d2645f2e891f6daab97d9552f9155ea. 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/NL4AW2325202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e7ed50689b79efb75d24fcff221c601afb5271fe908160eb8267771a75a1bc. 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/NL4AW2428202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f664195b6eb540314561a138f2da68718797c53e78dbaff1b9dd0597e310b4. 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/NLS762400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da124172e65bd129abe9d1a8dcbb91cdca3103b3cf0c09a16957fcbfb9e4aa7. 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/NL4AW2429102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdb752f767b52b30a92a23a015d9a256787f3614d610b89dfeeb13938623abb. 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/NL4AW2428602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd0ea0c4c1565e2dde0832d49e6a486990f80c7380237ec3827129b08ebc1b4. 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/NL4AW2327702.
Heart of Steel (Spectrum of Spoontech 2023 OST)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adbe6132402ba88b54f951f71d1fa6dfc2678462b9c2b8e334ea50c4f805551. 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/NL4AW2327102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305887d432d9fdde8d27d812253a5f64c89a87d4efc040a9dbdef75408ea8862. 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/NL3GR2305802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74146ebdbad91e68189dfcd1a8399a0d867b21ee4e37b524b12945b21a6ad754. 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/NL4AW2326402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbef360f52fc30127ac8ff19bc1c89945af4dfafe245b0ffbbcd9306057ae00. 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/NL4AW2326302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201584dfba396548f53fcddf22367680a31985c8ebe44727514111106c2d2e55. 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/NL4AW2325902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab6e92d094cfa2acbe2563cde71c7217be15c04d060894d6b74502373195476. 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/NL4AW2325408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1470528206f8ac2cc363d3a976ff47cd644d1933550351cc4ff73073f08776ec. 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/NL4AW2224902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0729778587f087eea7801564f87ba391b4ff065de3615ef4e3686c4c3047e521. 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/NL4AW2224904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0729778587f087eea7801564f87ba391b4ff065de3615ef4e3686c4c3047e521. 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/NL4AW2224904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1470528206f8ac2cc363d3a976ff47cd644d1933550351cc4ff73073f08776ec. 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/NL4AW2224902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee371c98737245bee8a724a52ba09e2a03c73a59fb9bd45063cdcf40ce6c835. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NL4AW2224602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaebd7bddc1be3740fb4ccbfdb9d574cee3a151042cf7a26dd55686c247b8ae1. 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/NL4AW2224302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e4a8acc87a58763d16bb7703232517276f0df00ada16c4dc5397efc0d168f5. 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/NL4AW2223802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e49c1bf8a9e412af95e4e3b005619e6aeac0568a7a313e2533b79abd9910f75. 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/NL4AW2223502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe428205318ed30aa3bdb2d179645741db6867da7e582f25c5e5b7892dcfdebad. 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/NL4AW2430302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a32d778d8b0a08285189c9ca34a082d72f4a5cdc7db9fa23cd14035b5f7d40. 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/NL4AW2431002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c867f46454feed7824427d6d2b1ad0a833a93222a1cf99931d9e2bebea85628. 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/NL4AW2538102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619a230a391479031a96e84fe7c8080f7d39fa46212ff2e6f1f41a4429c9c4b7. 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/NLG3W2300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3228eb96402ecefd53195ee6d34546a2592d876b25c1a49cf0ddd63514488031. 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/NL4AW2429702.