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 0x46aaaa784af2053765c9b5a7461330c58b60a5de5477c6cd30ef7ddf19b8a6ff. 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/4063a627-8776-4fdb-af84-ddcf9e153f05.json and https://artists.proofprofile.net/proofs/artist/4063a627-8776-4fdb-af84-ddcf9e153f05.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 0x7760f30725464c35ae91f0844658033add10f0b2a994d0da9ce9f81a54929b20. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEG932202987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034a60d89cf751b936e1ac1ff5fe680ea3c4a0edc6bbac3c0675f10fbd741ee6. 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/DEEC33501300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35723c1e4e8262f9c0a26b2bed02421b1ade9c85294830e43b2a6b7d69b3e72. 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/DEEC33501301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d95bd95632efc19d9cd405d1e7615ffa16081f1ad43cff33f9abf1f998e4989. 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/FR59R2524933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd291170c20a19bcfd52d26b05fcb6f5537499a9935107416c46a6d96cc1a11. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR59R2524934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf715154bc0343049ef100c13cc39d5d6c5bac8746c4cda454071feb35419d0a4. 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/FR59R2524935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d6f7b755676db90bd3949d3eb7d9a1553c843185e1b269b411eea090fcdbff. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR59R2524936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7248255b301f4f39053f2ee78d8c404080d5b7dc1a142e92a5227ebac384a164. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEY472571592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa9d850bc3baaeb7842e267d68b2718ad32e1f76d9c14fedd81e4b1951a80ee. 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/DEY472481305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36811b79dc762922de5bb902f346620c43668487db6f974f106f8a6cc682208f. 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/DEY472478886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4a7715529002d51e817f2789a7e3bd3d11f1e8daedf3d6bacd26e044883794. 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/DEY472477598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0256a0c3a1a2ee4331e0924f0f83432bf275ab399bd60495b75e8484b16a60cc. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/DEY472475660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bcdc54198c742aeffb0dc0ba276c687aeafe51f21d99c25c54c6cf38d20fa3. 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/DEY472470802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc891c0a28f3f6b30e09e015207193fa6ca25c2f6aea86addd9355602f1ab16. 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/GBJX32005084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a7225d566c0282996415b9fb429ff93f6fbc2036a55601473ce264f802481f. 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/GBJX32005085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e4ecbfb124d17cca82f1f4fe027297d30c002b6fd4e15ed68b1a855ec2dd97. 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/GBJX32005086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81324be753bd7965470633e8858867894c930390dec17fb92b5f3cd408a339e. 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/UKR6V2281229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a37accef0c8c033b178393dfb5b9804f25865836a74be08e0f1134a10ad87d. 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/CH3132216576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc0f70c6f0a72cf4094a2dac9271d3337abe6b4c5a19ae3f365d7ea0db2e44e. 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/CH3132216580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1faf412f2f84eb236be5180c14a614360294fb45a77390a71befe11b862adf. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CH3132216582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1509cc27aba3d234bd9356a840c780c9a00478f005d6658f9f5f880be4eacb. 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/CH3132216578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e7261838e407cea15f8e30192ab46ec05b4d25318b5d5bbaab1e47306bcee4. 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/CH3132216581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51adfcb1974f42317d678ac8eb13fedbca50fadddcf9b215725604d4f4475e2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEXN82295335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b8f6eba8af2f983c45d051545b60f4045de359920c36b5d1ce74365f13c2f9. 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/ITSV22100149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31fa799c50ef03f709b59c6845eb49195f66a6550b3e51a4160db20824a334a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QMFME2101031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5bf0795234eb40355f14e5b227a3ba2a7bf4e0d51e5e9bc142bd49e65cad56. 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/DEU672100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e288c7ab813dd71106614a81bab361fd2d502d6857527c1b1b42935bc271a2. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/DEU672100606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7860d3b6ea3e9ff6de033a56e1848d5044c4e73eb00989a0f05d532668706e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DERN42100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a835684e4b32f63fe6262bd537b8eb0122820e842fc6bd4ba256ef80c45f9a. 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/DERN42100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e12809fb8af92b9b8b891d57134006deeabde891efce72fafc387c762e73d2. 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/DERN42100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1def76f8120469d6b72ba38f16e5802e6e1b76081b0fa1c2231de9bbe0d93592. 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/DERN42100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef4c7c8b7927ee0ab88b983a63f03f48f495fe70b90f66599acc662cf958d1b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ES7842029331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e366268f3e6a95f1095e974ee1105be6e12e98641b670a563988e3b13f1608. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UKLVE2000627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682ead5bb4ef286f0213102489b77faec8dd86bddc59b859ac8967eb260756cd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITSV22000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad63580cbee7d6ac38e21d0f93bf35ce95659b4e2f639317388307e14e83952. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEG932001009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e00128f851dd20b3a721b48dc1637ddbae7f239a49a39e0c3dfc125b404917b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEG932001007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7786e07f21fdfed929af3488ffba248a9922e445450cdebbfddc1897e627be. 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/GBKQU1970748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e91dc2d23ab5907c090f8a87e5815cb4a8215a14b32d66eafb154bc1f4fa60. 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/ITFGO1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0de418e16209e48ef2661e843fcd84c20e858e082a4c4e6b6f396b89aec3403. 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/GBLV61922159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfc47504d1f258fcbe9797a150018159e1f082a5cacb905f501599cef0fefdb. 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/GB7NR2147203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba0286f6aa3344004317cfcb1b8191095d12b4cfd81bdbd7bb985a64fb57763. 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/GB7NR2330006.