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 0x0ec5e00daa8590421fd32101567b3d326775c03fc945d0c0fd4d5838d0929f2a. 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/e18c1a21-0bc7-4034-b2c2-731227cae0ac.json and https://artists.proofprofile.net/proofs/artist/e18c1a21-0bc7-4034-b2c2-731227cae0ac.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 0x2e1a5a2d970ce2d589ee5e497d9042b9287ae3a993dde89d722156d22c17300e. 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/USQY51357932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dd7c045a16969ce709ec9f4a0e2dcb947b17e4bfb993550b55e7d19ffb7705. 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/USQY51357933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e429814929add0695729a96c4cb24e77b341fc52c0a1a8ffae54be1cc0dde3. 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/USQY51357934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a05177ce6896ceef2a6dbb0400ea471fcd04c01186ddc30c18a73231479a9c. 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/USQY51357935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4169e4fb6d98ae38d3e35a90ac16ab7ef8ed5196d59b774d00b1bc794990865d. 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/USQY51357936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8678b9f5cf490d836e1ebfbdce77c8e23886d237123f66871d596fe025a89917. 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/USQY51357939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d13c3e62b0f919af47d04dc96a6784699f6a0cfeb986f1fd40a7d02b948741. 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/USQY51357943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa315dcd8d99dd79e444f89a6ccc24dbbfc04500ab53e4a0a68e1c7e977143884. 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/USQY51357945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19c5a988b253903640a9e6af9e843bd98f98204b09da0b0f341f1910ea61af1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USQY51357937.
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 0xb1592e6f28c7931ea52752cc31bbee90203f28d434380a4a446779aa33e8c2c1. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USQY51357944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f8bfb183a5f4ee321a03f522974bf5259ec093dd48bb35e7ab7321754cac2c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USQY51357947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9641596f5c4461766fca936bac5253acb46a9e5bfb704ba0e8d6ad982e4372d2. 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/USQY51357948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cffc08fca422760fd47238a97daebad85189e92df4c5bdc98eae1acac583631. 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/USQY51357949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59461b362e0ee189f4b317fd2021c31fa692c7b50ee152c3233d46d7bd9a5442. 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/USQY51357950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1de2e4badd0b7bb07f3d394c09919bd876f78e2ba737f88210b6dfca397bdc. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USQY51357951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd724ebd8253d410e4c58704b040614c8c21d2b07700374e754db532f96469d83. 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/USQY51357952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a3207823c12bb2cc1e93f7569a05fb070a0b9854b4da583dffedf4fcdbc977. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USQY51357953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f07119e5bb10b4435d23c84cb0c2a65f5cfb4046d8f69a60873db6d155ff588. 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/USQY51357954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b94f05c89c910c1dde94467725db48dec17cced342d4467d97fc6b95b84320. 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/USQY51357955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6518e2708648aa68b760649998cca10c7ffdda1362699b7e839c55bf504969f3. 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/USQY51357957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dca0aef1972f6980a44cc9a99a1f5282b62d93fe216b6dd44d43005b73582ad. 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/USQY51357959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35af90555a5113749855c93243d58f4c5092ddcddb0c8adee761df39a457b512. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USQY51357960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87489ef906ab64bb8f90c941cb45a9c456eed479abd2da8d8efe809ce6bef88e. 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/USQY51357963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f7929b9851e4f8677c75ddcef8d40ad4fa15af3c59617e2f6911348dd68b1a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USQY51357964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0292bd54af150a74c0c8a63a9ea279cbca9f502fc58742afc78f9a5293a522f9. 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/USQY51357965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd06f073696197ea9df05ee51c2bc2abef171f5d4cbc81e19423188e9a047bf5. 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/USQY51357958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4a1a285cfb401a04da8cf1b7c9c4edeac689206e9f60a80b725d8ffb519d9e. 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/USQY51357961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc8b04fc34ceed3f5203f6083cdf813c787f939dea79ed83bca0a6071aecfc4. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USQY51357962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa772b6008cefeb41f32ef8ad5b082be8ab26354af06924f1948d08f63eb9be. 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/GBSMU7568539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6131ac8098049823d570ae2e3a42fbd4c69ecc1bfac28a76b81cc645d21d3529. 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/GBSMU7568536.