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 0xd58d0c976ec4f67d4d2ffd1082d8c95fba1b21ea424457dbd2e8f9c8101853de. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3f1f4e9-7e19-437e-9f46-230c64798f6d.json and https://artists.proofprofile.net/proofs/artist/a3f1f4e9-7e19-437e-9f46-230c64798f6d.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 0xcba23efaa1671051df4eb2257f8a2ab8a32b566685a0b942701736deed66be26. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ZAA020100670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e9da7bb31427da7d8175efc0f294b81764506435127f34bafd4de945d0bccb. 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/ZAA020100671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23df679d143daccffcc1ed865edde381688510c97e1bcec3f008ac0dc2b70904. 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/ZAA020100672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fc89fbc596318706fc7d77ff7c544c21578ec2f6f8bd71942763995ecbc12c. 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/ZAA020100673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00293a084160410fd5c6b12ec69f43a11604ab7428c272fe9ef3a402c47cd00e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZAA020100674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5103e7c62d96f2adef16e374d1be0d53ff15b2e34e9ebfd9bda56c50ddb507. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:35:51Z), 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/ZAA020100675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c4327c56bea65716d93514f95e57b64cf6da3ae49469abc911c24c7a07144a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:29:53Z), 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/ZAA020100681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f72c97f65d3197723b426006c223045455fe4ead7c796d0d4470fad7060d875. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:25:50Z), 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/ZAA020300497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18340749da4fe5ee1599eb5ae70aa3a084c9c498908031deeb39c72a7e77dd1. 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/ZAA020300498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c95a9d26d5b15d32e02c1703e74ddc437848d0618f2d3dc9167458ca721904. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ZAA020300503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82326af5d3b8914fdd4f1a409e649a249d0ab5add53cd381fc5c3195d302579c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ZAA020300506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06da6551c1338752499801b7f10893add302e6cc84246874691ec0b1c2a6832. 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/ZAA020300499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2205ec000c4b396d1ecbe1d5ffc5cc04d8fabf188e1f1d71d5947c3496f05f0f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ZAA029700579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd412c7ca4dfb6e32281e0dff57bab91c4b2a720a4ba4b4c8da8f1aef90844f6c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ZAA029700585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce013c9c99e6a8f7f24f2f3d09c85c55952dcaef10048886ddfece8a251dc9e. 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/ZAA029700586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e08330dad32904a9deb1437c72b52ba30fad54b7defb8db2b915678a1b3cfb. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/ZAA029700583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd63d794afff318d6d7c94988b7fe39a0e6d24f3b087b37352193f34edb7639. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:53:02Z), 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/ZAA029700582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67092d5a0e09bcd1ce61899ce76ade701bb8267e27e5cf10489ef611c418ec3f. 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/ZAA029700576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab552a3963b97ebccded7cb17648620d2fa9f6f5c47e7e2b92fc320dcfc4f44. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ZAA029700578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dea69a7d80db31568caf8ee5fa20995f9d81d30300a524d4b2666774946703. 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/ZAA029800717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c946aeb5a5f18230a00db17f73020290b3fbdcaa970ad9af4d05f640fe2b11. 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/ZAA029800722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a33b3d1adb8945732eea6e322f2a11139f06c7fbec39d708c9cb557d8de7b4c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:07:50Z), 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/ZAA029800721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817c0b1312b7d8ab6b5ba283d513446d52aab491e69c3b43934c74ecd86f80ca. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/ZAA029800716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0283bfe030591d654ed18588ffdceae0abc3012f8ad98366e1b72084b06a554a. 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/ZAA029800720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97d34001a8b0d6a7ab5ea63d7862afbd81078599b2252eed37ff9507c3e74df. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/ZAA029800723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2307474c909e6e4f1adb3194d6250f5a1ad8a0a966c47ba163295f0b3308d0ab. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ZAA029800719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58ad954f18a33a9ea5bb04080777a3e698c584c95f136c842878caeeb547261. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ZAA029800713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeab22656addb430c098a92405db782da289aa19c016eb5b8975af1f528d7e7f. 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/ZAA029400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc338a51aba91e3818f32bea90394fb79fb778e7809dfa033959e0beb58a89a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:42:48Z), 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/ZAA029400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4a129c421bf8dbb6c3c7f147a9893ae9a9c80633d857b056ee66959ac55c4b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ZAA029400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1c5c2850a882996f3c76ec47dc5c90c511af4ac1d0f95a11739baefd5acc40. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ZAA029400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ba34b917f385d692440630f5c15bb493cc085419696c16a173539a36c08139. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ZAA029400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b1d67c23741e14c77fdeffdd9ac3406a126341dc454e2f26b0155610cef242. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:45:48Z), 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/ZAA029400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f1cb095a80b6d9e5701660b26b7335aae326e7c2a6ee72294155225d7645a8. 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/ZAA029400025.