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 0xfec27197a73b0ab7b9ed9b0f87757019a10a6c6104ffd807dc411648bf0134e4. 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/19c6af97-854b-43e7-901e-c8de031bb9d0.json and https://artists.proofprofile.net/proofs/artist/19c6af97-854b-43e7-901e-c8de031bb9d0.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 0x46cf9792b9ce06350986b3831759b9bca482cfb03e544fd92cd693aa225be881. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/BXH1W2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe96bec31500927aa65093e242f0025106e99483cc0bd362f444143190234e50. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BXH1W2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8671d9710b4da63c0e7270ba699b99c8aabedf5c4e718d36ecec2be4b72f6e. 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/BXH1W2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00062472e0bd673fbe2304872bea42d13f5ccfeda4a3dfcb6816793602220e88. 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/BXH1W2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b975ef7324de4bd23b83082c49e7c4c1e37030016f4fb2cf9861d70bf3463e. 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/BXH1W2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e6e6fde32e03a988337a1df22e03fa7d1a71bbff81bd63fcd8a9de88f48456. 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/BXH1W2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c69497de4ae70f19dc542145e3a3b6e51e67238d3131f32825226f2da4c0057. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/BXH1W2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151b4b1e14c511c53128f123915b8c9d06026727e12651d4af031d365e8b174b. 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/BKFIN2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a61618c7da968a30d04d67186fc1fa1d4f5c0a37fc71ba565ef039ca5ac748d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRLQ42100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4f1463f2b0241daf7f48fd0fcda916dace06f7d8e74d6ce7bd452cc91e2627. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXBMG2100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b06e6d3405e250b6441bb1a1282a7c6306a29249b400feba6c1621ca2c139b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/BRTRB2083988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80b2cbaed6a93e232718d81a6a02e293d731613760d2ed67bbb5f86d87c5f4e. 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/BXH1W2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6d83946b5460ea00f1ec94b9eb2bebce471d1a0a6b050721497dd5d18947cc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BXH1W2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e5264a50099c86b26896fc5ded22e0b20286af5a2ce803fdfd9ed66677b31f. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/BXH1W2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8671d9710b4da63c0e7270ba699b99c8aabedf5c4e718d36ecec2be4b72f6e. 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/BXH1W2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00062472e0bd673fbe2304872bea42d13f5ccfeda4a3dfcb6816793602220e88. 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/BXH1W2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea5b053ecb145da5680088e1df6585368bfa0b20ed552cbb26a3e0e053bf86f. 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/BXH1W2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10129821ae4098e961c714c09e9894b7c18bf8c6c052892e117f48f5508e22f8. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZGLM1920923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08791ca34a78a5ff1cac7c9edaa3a321984a63b95deb1e0ab09a30b6a6205e7d. 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/BCM112300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252241619a79b3e436fe0adbc714435b41526bf2360e2d1d0545ce79b617ad7f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BXGOA2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc88726ece9835a8b6a0ed55439dd214275efeac78c8074647cee97bf9a6ee0. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BXJEE2000009.