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 0x1ae90254cc97f37e1e2c04223edf5e10b2a49584e70230489f9a6660ed6ce9c1. 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/181def7b-1971-4a2a-aac5-8a1f11fc8d07.json and https://artists.proofprofile.net/proofs/artist/181def7b-1971-4a2a-aac5-8a1f11fc8d07.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 0x46db74e164144335f78f8713775a331b50a7b00266bfa6ff8a0a5b463fd8d924. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZES72331722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7871b965be776f50bc5d4a4a7140d2cd14e9b9006be18b865bad938ffffbd2f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZES72331728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe05b8bf07f3edab4dc9f8da5a7ea9e691784366662a762e10d113fd7dfd9a67. 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/QZNWT2436854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da0a07f4b9bbeb5a818a0032268f274fd67416ecb09f5e3e7a6b0bc6585a200. 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/QZNWT2436855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ebd82680b7c4b36fa0769b72a9a4e91f83f49b6c860af9600bf688d89bd02d. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZNWT2436857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdc1d8f9fefb804a4c67a510801a70e56d6af020f4eccf51b3459af59ab8ce1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZNWT2436859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43bad8f4a8ff87e6a78274ef7494de9473042032c769b0551110d30b166de52. 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/QZMEN2427995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbeae6b64a71b7ea27c691eb00ba11b021d2d874214b6bb48fe133011ae4d8f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USLD91764800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c91ba7f83946a6cca3ae2d6794d190bbf3aec02a8e93da669251f8ad950cc1. 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/USLD91764801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519728064ec3bcda709816eb131a2d3d01d960b985bdfe55c4e1c42642283b5a. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/USLD91764802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3204fe017185bd0beb4a10354101997b31e7098b30f499ea98c4ae0c78d4be3f. 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/USLD91764803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c19ab82f1ecf090b32f4e991bbf3b14aef598d3e9e9b3931241f2f4125af4b7. 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/USLD91764804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff5a86875fbab2e731b8ac53ccefc807c71aada8b9d0a91beb194800fc0949f. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USLD91764805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5b5361662450bae27510d9939cfa50ea8bbaa967dde28c41dc3bc09e436599. 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/USLD91764807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73584f2971844d945b426a6ca3ead1e7ac7c228141b7f01201741f9012fe442b. 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/USLD91764809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6a5637e3906fb0538809f21d436c569f11992d803bd29ce210607f0c8009e2. 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/USLD91771307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3bcefb8f7da023f89447ba3f5f67598536982342b58095bfe55c662f0f234a. 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/USLD91771308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1714714689b792066f8d9f5fd2810d650ee1a48d7580e32572d4c44e9681049. 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/USLD91771310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2504146a1cfd46b65f00e31cf205ac8894f3ff29193313fdbbd051076865eb9. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/USLD91771312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb05275eded185dbba2d337bee8ff5053885a90401bfb1da9ff9b6b6f54fa649. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USLD91771313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bed2f9352f36195753e11b7e0756e3fc0a0d9cc044d4c2dad2b14e2ed304837. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USLD91771315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37402adbb47f675fef6533ad005f91f6c13fcd3e4fa1f5133fd4d127eba9fbc5. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USLD91771316.