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 0x10a5b20678b3867b493d9413f5509e41250139476b37b9a1434d0a9de9d1dc61. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2609f26c-cef0-4316-b860-d46b3a7512f7.json and https://artists.proofprofile.net/proofs/artist/2609f26c-cef0-4316-b860-d46b3a7512f7.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 0xda025e39e4eb585cfaac7276fde11e33f8dfa06b1b1a30ac9a550cbf6473032a. 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/ROUM71600140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32912bc913a40538888c6648ffaf429818d70bcc6bbdb21e19b1ea865d2828bf. 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/ROUM71600141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79806f1de83a60a8e77c5e79db8865ce1eb3ff9472189b8e2c9a13c7455ddfa8. 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/ROUM71600142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916b8a40d8852efc2cf00c4873792853a3d32fdd3dcef075b6e8f453588277a5. 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/ROUM71600145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d92d7583dbbaac2892c386b8b2dccda0a34bca03165f04d019ebfc2c713e86. 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/ROUM71600147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5b89b099492c714e382388df8b6fab0a5173ec65c618b85fd75a8f9907353f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ROUM71600143.
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 0x2996111e3aa16a731d16083fb6134576dcc352b5e279ebe0c81fb8b4694c196a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ROUM71600139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c891d81c5d32fc685367efece2bde33c10ee507726df69a7e5237b1ada7cd71. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ROUM71600144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8c2b9fd60a1dcdaa78de1a8819664a87f3ca0d01abb54303161ddb77f34f69. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ROUM71600146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3937388bd5b1e73ff34cb2c83bab490ef7a0a3d55fa587d3327c5ec1eb282a. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/ROUM71600148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf149e0373d3843f48332feeb6f4a7c3431ad14ca8e1bfcf4fd145d517def20cb. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ROUM71600149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebadf68480bc1000aa2e1c6f50f44e181c364bc6a4356a6c22aa4f4fd5f249f9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ROUM71600151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e031dbcf50aa5f9cfb5c642a50f73db1b14a5078d7758543bf53f970cb5ae2f. 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/ROUM71600200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e057f72053fbdd487a822c3272a052a523ac844e34a4c5b31980e89c86225b1. 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/ROUM71600201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89061d552c12b35a9bb6335d5a01b40fde36b7b56add7e5e51423eb46987a207. 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/ROUM71600202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c44a77394ccaeae75b3a4e431852e9233d7c130abcf88e0accae95113c1f178. 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/ROUM71600203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0645aaedb3e8a691d5b0453590c99d36519abc2edd86fd5dfebe969ce69e61d. 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/ROUM71600205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccc74689312a2205a4ce742bfb4af5cd8913759db6af786eb5de33e595e9881. 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/ROUM71600206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01bbc22fd8ef5788efec50795543821fc438cdc180a1f5a0ec6ae81d10366df. 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/ROUM71600207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dfe158ec4f714196b1c894d05bbac23f6f1a46d3892f9abc5f21cdfbb245fe. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/ROUM71600208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecb3275d5e6fe36cecd6af31df3ae8395e7a85ba219ab88fc6e56ee6f9b5405. 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/ROUM71600209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd397a175f927370eb810844b87c592f706d393c4c17655813122500a3ed99491. 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/ROUM71600211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe011af8f3ef43e5a9b4f75d3fc9f4469da253cb6c21607a8b37543e48b29c0. 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/ROUM71600212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd92016efbcfaa953feed4b667179bd1ae9b8ccbb9f39816960fc9999ab99d7. 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/ROUM71600214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d819703266ee63ff6f5f921b7db7053eb1809e64c3e0c1ff064be20ee0a3c6c. 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/FRX452040966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0539ce23c400d7f299cab000b2686aceb6dc1db5dc105b936ea73efcf72a2777. 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/ROGRA2101790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f92d5634ae97bd1efcf914e63364be568582ad11fa045ba53edb30c79025dd. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DGA082275492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3afa744ebf4a2de6c57f3066c20e686c9b1591d7d80aaefc95ee50a521b763a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ROHPA2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e80f323f11beb2724729340972ceb2a930741d0bfdcb08fa14ad64ee4f370b2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA052440203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9d71c65234df1423b98f120d5edf6f58d9744772a25724863acb556aa60654. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:39:32Z), 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/DGA0Q2427421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d87340d7e9a7d0ba82a337c5008a0168a2533b1bc53f181fe79fac5a085d0f. 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/ROHPA2400100.