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 0x67a9015988356bc843c3df35b926097b5eb596afb980907bee7bf0542bf44c83. 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/7c13e2e5-cf92-434e-902b-0eb0e6997d92.json and https://artists.proofprofile.net/proofs/artist/7c13e2e5-cf92-434e-902b-0eb0e6997d92.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 0xc82395fd13bba86c3433ba43d9072ff2124ba200d1c6cbb9cb8f9f0225484028. 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/QZZ7P2590621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ce79a17a0364e5432f9e3f1ecefc4769aa61c3513b29aeb459cec26305436f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFH2537249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b074bda787d5bf9f75505fc47303f8ee8e2ebd0e688e1daa3718689b914556. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/GX38U2340905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea41802019734a4d78dd8b9e075b4de4f36e1173515c2c82b26653c32405348e. 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/GX3HH2359584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3068d12cd3a4ce2b85a3397bd946657d810e660157839b1d1e19f6c0bc049b1b. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/GX4R52379861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5881628d5c18f28f18fac1feca5f25f5734480c7ed1fd32879a3655646b36392. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GX4R52333103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255ce635d1bd3313e4b25d1fa0cdcab552130a217504a9fdce243ce1e4186049. 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/GX5MX2381745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e4fbceb216bedb0afdd1625facb427bdc8903834de9d8c4f82d5507c51d1d4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GX5MX2372937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d82cef30f4198280d25d812dadc91a5a12f307873d589197bf902d9bc7c372. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZZ7P2587998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08e3815f539daf13e4a7a95ae67eb4e7541bc799371eaaa780dd36a0acdb004. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GXBDS2379814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821b995158b187789f5cb47f60b4a2ea4437bd172f4a4d2fdd2db732638090f1. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GX89G2447757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70b83e0f463da760158086217a237d2147f3d124ce988ab5746bc68773277c9. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/GX89G2483934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81cb87b207c1875049d88f70e59b13cb78a094c78c4b70672c3586eb93aa469. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GX8KD2429403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f88463b80be089676d3085d09302d6f94967cd4d78be34cace2a59a03f4105. 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/GX8KD2433268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5106c0fd6b764bbd205cbedc3f7c86f052db1da77a166260416dcf98ddeab93e. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GX8LD2441232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fed1ddf1888ccbe2d4ad0a4f14b309edbeefc00ffa8038d86a619a8bf7ddb6c. 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/GX8LD2481105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa14be204bc42d1f86c457fb54cad42a2be15f20427a804f77e986107fc5a7e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/GX8LE2491810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37242596006fa7034b64e2daa8cfd5855d530e8f5fff5b9b0bb98144c372fa9a. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GX8LE2495953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb7b5d4f6091abe55b9844adb9d999acf567ed70fc63b803da5af6d047f800d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GX8LE2413939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bc075d5375abc492ff2d53af324599f1d7dbc62f5cee929216af6b9980c39f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GX38U2489024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cb36ad43ffcffdcbb6eb26f42635d3a2f820b7239bd62b5d9f66a5cb0b4bc9. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/GX4R52477795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71925475d3b5a6fbfb31a439eadaa2e2f331a7df7a0cb81fe34e04b946d436e2. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/GX4R52469516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb76c95ff9f0e73111365508af56c81528b252d403aadbce97771e1a818a9fb0. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GX5MX2404895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18b845d205e47e3981ba59c49453ea315934eb9a0337db82a9f1432137ac08f. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/GXBDT2435303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fffe0955ed366948a7b11d36e44742930d48aa0803f0588ca25f0c5db69100f. 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/GX89G2530293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188062d95e47033bb963203411a6ec700505dbfa5e56be2bcb353e6b04bb002a. 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/GX8LE2562549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dc47c41ae2d65c38c9c7dc302380c2b0a954477e91d4f5bd1333272676ca36. 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/GX38U2520415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f684927a541588fb921ccab3d36f4aa1aa452743c12bbe6df06505cf100d9d7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ782594007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05df7a26bc0c94a5be787ff338d1584101cead43d7de5b7af07ab0b4a83d771. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/GXF972533696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a5a3bb9248470a49c56e70baaa6f63c217d4e7efcc81c2c6c5667e3a13cb96. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QT3FC2536088.