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 0x0cc5ca10b05f093c9d2224ede36342bef347dcf8af68d3d6136a9ae64d85782d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5adc1b19-fdfd-4ed5-acee-9a665c5d2405.json and https://artists.proofprofile.net/proofs/artist/5adc1b19-fdfd-4ed5-acee-9a665c5d2405.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 0xff3d6d57373d910e33849b4ef21672c6f879349331baf77d884db5afdce43940. 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/USHM22132205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1732e5bf80c2653cf18de36c5dfd86a06f12a1fd881027c951a32ecc85839a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM22132206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833deae79771b598966b99c1a92d208ca64bfea78e0f805887072c81ad19f981. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM22132207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28fbcde54ae6273576355d0c54aea9e2993835932dfd5e0dd8d3c14395a6bbd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM22132208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1fc67556c5be54c1d4b6ae7b88f5fa961039aa07b59945105422ba08731971. 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/USHM22132213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08db01f4e02c6479269f6c009f113a94cb2a394ba8d933576e8123930054a3f8. 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/USHM22132214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53acc1f437960d9b0d43d77f7133fab0ffbb865e4c9e506c2cf74b5ccb5cdc74. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM22132215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170ee36aded84f2f19ca9251153cf8c4a771af505fa9c8d1c3c575a3d58a8d7e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:55:19Z), 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/USHM22132210.
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 0x12c64fcc8ea02f4620ec3e34da089c920f857aa3f7947e8f572e02145683282d. 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/USHM22132209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ca382223b446d53f96aa7fff83412dfb037fa0f2c3c0ebc2a68fc045d382cc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM22132211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbe9933c066bd858f3e0c5e78b30cb6411da256f979cd8c5084a4db9148ffe1. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USHM22132212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b431a3d1fb44193e94e0a08c5b3e4d9184a0b1e671853f79dd95a6a4d0e4f3. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZHNB2275615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4031771ab564be6d4184c9c7f7b68edac9233d7edcc365b536c44a4595f325b2. 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/QZTAZ2206954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05a03bd40f6725824634c03bc03d03c9b229e599855b52defa1094ce9f25d12. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:03:33Z), 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/QZTAZ2206957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b958835387ca81fb2c00ec09fee72beba57ab56fa53164d79b839d369d6502. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAZ2206958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22adeab5e25744f31fdfcd041d05927c42d45f7767a28960099abccbad62fb42. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:00Z), 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/QZTAZ2206959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1545c7829a1fbfbba1c602e3be493328fd056d96bce93da68c2db89b243f60f9. 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/QZTAZ2206964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc547ac2494c37c748bde5d1e19fa87533709a39886857e83e83cbf63b67dce58. 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/QZTAZ2206965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e636ba6a74107eaed3c3310332d84263c35689cf05c689a0b466e6a5eabae02. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZK6M2454476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c952b847026f5708ff05632789819a12020695b92891b0cdf6817d31ed3821f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6M2454480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b431a3d1fb44193e94e0a08c5b3e4d9184a0b1e671853f79dd95a6a4d0e4f3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:33:34Z), 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/QZHNB2275615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ac2eeaadeb75f5317ef5787846a2710cd2b5ea7d58866383506e533cc75948. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWX2408644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0988671f660bc3c167b1a6382ae9679c0a0d17dab1ef4923ee7610438aa0e803. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ7M2451457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1768fc00510f7f82c24644c59274bc9641505e2d48f5eec125a10e0830334d17. 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/QT3F22499582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e392712ad9fdd5117cd9cc02e5f77251899afdfe930e89b2b927f4e55c4d5f. 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/QZES72570213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791d399ebbd37daa969d66b47d3a4d97f182bc7c565c12f540c7ba5465c86a20. 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/QZNWV2536016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064e7099429de1e724b03652b8b36e92f4e72c847f216371a154aa86d090b496. 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/QZWFT2581273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2b0146290a7d0c7d1abcc85c479848e8617a0926ab70965d5fceb91f738576. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCAIG2419906.