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 0xb76bb09adf1586c44abd8cc892a72637c4aca58fe3ab57cff3724ff2d51576db. 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/14a62729-ff5f-44fc-b034-a164c98d15c2.json and https://artists.proofprofile.net/proofs/artist/14a62729-ff5f-44fc-b034-a164c98d15c2.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 0x419de6db54c1f0e8c361fc5d9882dc714e1c72294cd54b0397eace599f73f954. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/AEA0D2003016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e6f9fce8dd5ed548dbd0462173e2e99b89be759e61513952558e1b7ad1f4a3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AEA2M2231256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd646e045f3db489cfebdc85c57ad846727cdf2a0acdf7c568afaf83ec2434157. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AEA0D2220373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332128dcb243a0474c7d247f6665fc0a4f329aad5911663444382ae797d616fb. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/UKR6V2252579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504e96e49b44af5b5e1b85bcb0b7e3550004034853d3ad88d5b056c615dd51cf. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/AEA2M2135809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a4221d5ad28f3194a3fb206860c50ddc6ef732ce6cceda3ff9c08525eb17c4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKR6V2255278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5f54689bfeaaa28233109fde713a32c2b604770e558f7856439cefc8dec1a6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKR6V2352759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c8ce8a75d76370336e37cebb3ca75ed898083b39325e286278c9a10ba66042. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AEA2W2319354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac83ef05d9e946ad0d8a260d3a0439c072c3d08b3f0b5e046c01ab14c5fa137. 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/RUA1H2305552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bbe02b0fcaf3cf9c7022f4a8f3b34efea39bce23ef6a188d9eb868dc04c8ec. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DGA052347819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8e01ef6bdd4f86242c3efe04d7630a1ce9d81881b07dbba4b5ec363a46ed1a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DGA072377956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff36ecba57ac6e8661a23774d4e6bbc54fa6b937ac78e94f47349d4366ea263. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA072377959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ea6c1ea808a119cc9309f6dcb6d1e37a66562bef2ed4a6abe2c71662af41c2. 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/AEA2L2433877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35134d6f85570a2c93fd55503fa1f82b1f8d6c823c30ffa062f046065f05a9b. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/AEA2L2475166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5ce650066a27362d0ccf522d09f08dce0a54a0e4e00b66ccc0ecc137f9fd3d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/AEA2L2477611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3c6e6d10af69c07784ad70ca08a630170aee87ef82afb033af47145b200ffc. 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/DGA0M2322293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c9065ad68f692b8c96c9277729a064227dc008cd26d14880686f3ab35047d5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AEA2L2432799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ae04511c65a0e88307c1acee0843fef50e1b7c9ad3385ffdb4132e3b4cbf1f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DGA092372021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4130e4f2a0dbe8977d726eab4eb78772afd6eb0f767d17fa49115fd49c564c06. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DGA0P2311084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a29c9c8c90deff0e1f43d8cbcb62cdb8c79aea27982c3d16515025bec1d6de9. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/DGA0Q2352048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc0bcf0f1fd41adc74ea716147c7eabb490ec1dd3cd8d0b416b55317b4da18b. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FR2X42459597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edf6dfc1cbfcc78ff27ef4c12b4a99f4980d8df6629d09b193f4fe19fdf9387. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/FR2X42459598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f25db6fde15b0684e5b1795e5e22d162a9a2d788f59699e3fab1d4d5cffb33. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX202447364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e5612bdd20deecf3168f22d531341229af40939afc33591bfa4f7b8a722974. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/AEA2M2454624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b556fb1b0e35e36169f5a8bb9a9a2cb6f462fb4327d903ee9780614d5357a6c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0P2442945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316743cd5e72475f2bac18ac156b2c2573378366f48e203a63fd73b056998c22. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/AEA0Q2475243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fb3533213640d06c851c115b3fa7b965ab2aa8b7011dd97f3932f278bb8ac2. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/AEA2W2502619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31696169e8c5ad5a85f5464352e7fb07c4987ae62df4b254579e6e1ffd8faedd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AEA2W2556682.