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 0x9532244acac5db959ceff67103b6b27b6936b68eefca738359e01a6fe24acee5. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8cf670b-5e75-427a-86f8-499e840b8cec.json and https://artists.proofprofile.net/proofs/artist/d8cf670b-5e75-427a-86f8-499e840b8cec.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 0x8bfa2b06a0252241daf3b8c32ff9dbddb8e748d8b1790bb0f47ba490e066080d. 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/TWAE32203825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9f3f322d3c6980feb0dcf1c8973167e6732c978c957df5cfd3e9fd6c08c557. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWAE32203826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f980d99634d90ad22293ae4c1cdae302ef64e687b9de36495d01d3b7f6b0429. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-21T16:47:39Z), 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/TWAE32203827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf1833213ee70da602fb6a75f595b7527a218f616aa0cb49e1fc4e9bf3dc802. 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/TWAE32203828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93b0d107e890051c914f7c3ada39c776ace4ac215942b5e4bbd373e856736ae. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/TWAE32203830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc206da957670d554ad43b730ed3a33c0ff6e16fb104e2fe6a961ceff54e2f5ed. 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/TWAE32203832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e4ec29f186c4529d9c033344f928a89a9abad87adbc1f2eed80346cb16664c. 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/TWAE32203833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6972e327352a1d14101dc860cb77725bcb09607a3051e45c003b49b7d613096. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TWAE32203829.
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 0x7d4fad308d15d0644348f9f734e137f121ecf256a29801a06384bc6480760bf4. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TWAE32203831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98846f601ac50fb0ba9515d9dd66fcd79d78d04cf1f0ab684594acf3cf279868. 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/TWAE32203846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f707e96149d97abdda86a7c931d80a23260a8144d8f11a1e161add94683362. 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/TWAE32203849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b3bf6017bff449ded6caca6699b4dab55974514265fc83fb8717a8ecb40389. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWAE32203854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd0e6982eb1d70c88e7cb51a39a887bfaba7ff06ac71ce738db65452aeafb51. 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/TWAE32203855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91d9ebd9644e4d82b4a1c7db3b72a040e33ce48a461b220410218537e194311. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/TWAE32203845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c875af62616ce8b1a83bc83151f0a32ea53058a16b5bd44333c2f16a39c9df. 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/TWAE32203847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1dfd15a127af34097626ce2e2f68b8f9a383c27321316ce123d29ea52e5329. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TWAE32203852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc66c75caf81eed1704c05f82e0e18551ebc8804c579eebaedf9746570b76054. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TWAE32203853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f784ee20c56aeb24e0c47aae5ac21fa3b44373e28c8d89526fee3d61d595fd. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TWAE32203856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0c27398ebed59fef7ccbffffea0d34303d74f4c95847bc8129cce6b7b1803e. 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/TWAE32203881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eef037cc1c406cea9fcfe7304bb67f535bdbb219653b721497ec358d13f8d5d. 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/TWAE32203882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cd93544b5fda5d255ad72e2c35e1ecdfed2d05329864eb246099c5a81a8215. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWAE32203883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf611fbc616a3607463b7900482b7d8bbceec3f831724d2a1af67ff8cea8f1549. 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/TWAE32203884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c89a8aea0c4351a5452414a7af3db12965dbcd3335f6bbcce47afae068733f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWAE32203886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473a681d782e50b342687f24b3a7d59bdf2b570ab0a17a48e15df31599fc22c9. 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/TWAE32203888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb67054fa1e9d6d207ce48c0306b37365d33382eeb8a25794b263e41b95d180. 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/TWAE32203889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc5615050c172245388137b4721401c4bf8e617640a48abd7073a874d7dc430. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/TWAE32203891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddad0217b893ad257f38caf742f2929999c3ce32cf9de7d2f3dc1a06cad4cc4. 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/TWAE32203885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06b68dbceaba5474bd5ed390d8fe644596ecee68d4f044a34ee84691c787c51. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TWAE32203887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec8f4be2842607e8c94cf90b07304a61b0746333fbac49f653d16b633525dfe. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TWAE32203890.