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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff62358ca2b6d452bbb03a1db92a8c3de0c4797482a1b72fa58f25a806cd5669. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb2bb7e9-0877-4714-a57b-2c89ef55b980.json and https://artists.proofprofile.net/proofs/artist/cb2bb7e9-0877-4714-a57b-2c89ef55b980.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b930cb3dbb08b76204c18a9d4b3f7c1fa559b2dfb95c0366dd7717ce7999ac3. 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/TR0330705954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5619ba99fa52eca337b582028d48f98737a8e4ca67e29be86d2db53aeab63114. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TR0330705956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778905ef7b0741a6722a765598b6fa8cd5d9bbb907c65d7b720469e1d867c38c. 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/TR0330705965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b98011daf430142f31cc9643759284067fd0e0218d0e3d891a12def9e84dc0c. 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/TR0331209107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349acef3098623a06bad59bbe29e8a0fe4cceea8388adcbaa938559ce334064d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TR0331209106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60488f93488a2a1ad7702c0a4c6d62cd24dd6bcdbcc06e8a94f2d5fa6535adc2. 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/TR0331209111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd778f75be13478027ec5d207da8fefea430e5d6e9cf39cbee14605e71ae33f2f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX762532204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ff097fff2bf7dd34a4d8ded31be303da8e29c7d66374f14a8311ccf064b7c0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:02:40Z), 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/DGA052501145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806dd823a3bc93103d0b5455fed99a43d01d9a170702ed5e02038002a8bee92f. 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/QT65Y2559733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bf3a01ccbf44611f6d80ccace692f2ce7bce3f3c0bc8d095aea459fa144be2. 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/TR0331409877.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6344ae53243e45d33e186a2c1064ea2bf6158312724a50838ae673ed02df1d7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TR2811600273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25203a6d595ee954b90c4f2bf39bac47f6b832b1b179e2ff12165ae0a0b361d0. 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/TR0330604807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65d084a6626a8541a746f895350e46d0db3b15c28deba99382008cefa8138c6. 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/FR6F31645110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1e63e21205d74d1d766b7aed96c4a08c64b6be9774bf46f4c32547a23f8760. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TR0330906983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe25c1fba34b57122fc7ffd1820ed245631682058feedcd276ae57fc11e85814. 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/TR0361300189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6344ae53243e45d33e186a2c1064ea2bf6158312724a50838ae673ed02df1d7. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/TR2811600273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20561862d1d668e7231e0a7e44e18e96b5178f439a1eaf4d9193404c5df8a346. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/TR0330604819.
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 0xa7dd1ebf4271deef9f696832dc0ef604f654f9bc280a246d070adde67eb8e0f2. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/TR0331209076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56aa0ccdf896a4f93918e4c2cc0ba88c23758648080ce1e2bdeae3fe3c8fb02f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR47Q1111570.