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 0xf448422ba3e0b607da8a44304abb52535ecb1ee93cbf48269e66853d1f651386. 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/62e4b74f-01e1-40bb-8ae2-863b36dda310.json and https://artists.proofprofile.net/proofs/artist/62e4b74f-01e1-40bb-8ae2-863b36dda310.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 0x836e8a9008dfb1d179f3bdbd3d5667f70c0e68d01dce194f0f9a5f0b1a02fcf5. 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/ARG991032295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5159a28d0e0841903f3d010c0ddfa2941c3a368e752621c2987bca5390436cd. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/ARG991032297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336fad97da374bda42c2d92a757554c918524f13cc57358da4d726b07e362885. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/ARG991032300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d7a25f0853db381b5b6f2d173eb78e105bd51ea4a7c417802eb5bdeae0b10f. 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/ARG991032301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945c0b0b0657bca1ad0b6cd762bb7ef1024d0eed4a1d6022cde070af57a959ba. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ARG991032302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2397c06a64fd5c8f2f229d6d4604298dc53688e7a694cf941d6cf5328950ad1. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/ARG991032303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e891119d8f6bfeb24494d14ce85b67658f5eebd617bc87324853aced190374e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ARG991032304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba012c2ebf9b28772fad2000e308307db68f4b00288fd1ff71ce20b60798644. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ARG991032305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab37a829edd28ce5d41bf24623b25ca2e75a4a4df650cd3005ce94c97937711. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ARG991032307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604b946a54a0f8306c9e84eee96581c3da9ca34b1cdda4e801644829527e2e6f. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ARG991032308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e101d9c85cbe07f1c1b12219e031ca583828785615af7dd3241455d9a1fbd7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/ARG991032279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b4ab8c2b01ba4d525252b99fff44361fd9f728754e0c3d8a5bf5bf46daf66a. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/ARG991032281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf95b64fbcc7c20428aad0eeaf143eb1a0839ee4a1a43b9d27cca7d5438ca807. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ARG991032283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a76518e719fd9896e81fe5316f9c036e80b679186eb5e0f59fd1216cf715a0. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ARG991032284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0779ac12d140d5223ad299d1ac3a31b9de7ed688d67950e8c83ef697485eb9f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ARG991032286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb12694d7b4992257a29b90297dcaa6b084f3d11e9a9fb5e445e23129fa9e84c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARG991032266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f8c69319883a1e4e28ef38af0379faa6e3f6ddcefe3c987c0e8e173e8741c4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ARG991032267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945f689753db3eed5ad437a555e866d000ea82b73415067105113daa0941deec. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/ARG991032268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ca46bc63b3d61e57e080e244212746a5df28d0d7ec3d580fcc2e42af602ac9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ARG991032274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf9cd1e6b1436fa42fdb126dca41541fbff1399d23c512a66e898940943d411. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/ARG991032313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd188020b983f9ec68d570b801716da47c4b6e35b70dbb787492c98c3429fb3e2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARG991032318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11598cad8a63e0de772b5794d2de2b07bb60f29f4e8b0a0511980fb12f71ed96. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ARG991032319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8821af370d9ca00aa671fa9cbb68058747e400768d8741ceea70210a70a0cd. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/ARG991032321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a3a24538c2412a75a395988a9f8b35af4b62277af36aed1415ba1cc1cc0ca3. 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/QZNJX2432046.