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 0xa2b482e69a89062c08ab7ff58f0f271082c11e592526f8b2cef2554d940102fc. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8060b2a4-6a81-4045-a6b5-c29cf321e09d.json and https://artists.proofprofile.net/proofs/artist/8060b2a4-6a81-4045-a6b5-c29cf321e09d.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 0x25088a4a607ad93073f66421a0857fd05c659f54eb15fd010a10c70e2ecc9da3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM6N22448733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1033445d19c3108e87022550e96d08c2b2e097935be38d840fbb7ba59f5a8c2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM6N22448747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a7b6daf3eacc48f68a79ca020094a24a20a2e4e9eaed469df698566ef12c76. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM6N22448749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee3919c888ae3bba628a071c18a52796f0156b64ec5bee3bf37a163bc90f6ee. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM6N22448766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe791c34b75b2386001bc094705ca9f7e3e1ef4640e59dbd8899417646f7f3f83. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM6N22448769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65efd765a17ed0be21ab9e2cdf7104e0b4f7e630805c288c45819c00948dcddb. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:40Z), 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/QM6N22448731.
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 0x82d78b8a01122df43089fd81f9e6ad957b8acc89323afc11bbf2aca7db113531. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:51:49Z), 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/QM6N22448735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305dd860183f68b7737d7daeb067288460b9457dfa0e601f3ca88288dd01961b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:43:43Z), 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/QM6N22448736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ba40adec7488bada3d10407a8abcb57d0fd05946762db6450cfcf9558b7417. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QM6N22448746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05814f470416e8c411ec093ad6e3786ad81d42d02d8217f116cdf1afcd233aa8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USL4Q2307827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2270983342661ad35a22a7b26d99da255e114c344e5f680f867e3eb028ba369. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USL4Q2307828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3c42bbbac86250b4cde75d1d2a8823dfd4530e0d7fc5d9af3496976af2c3c3. 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/USL4Q2307829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3381a63bc59d5eaa94a566333005b770f6bd2172ddfb8fd7d495fc5351d21a1. 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/USL4Q2307831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25847b95086ac0ba9112d4fe3ac8047e50c945dcc3b9cdaba9c03fe02a8bdc3a. 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/USL4Q2307832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef36f2e7a9ec86c896e4dd125bbd64288224e1bbafffaed6da068981b1122bf. 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/USL4Q2307833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7c37509b2e6c68585d3c6258b54824a5e09924fe632ddb166c5e787e2a44bd. 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/USL4Q2307835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f359f74a7b3fc7a2752582184a193fbdaf8163434ddde021eb0b4c52c0c4d85. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USL4Q2307836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc868da6b6cab7df2df4abdc386f65a40413f106e89c494f7b2634d5545c892. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/USL4Q2307830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27487623c7e14fe76da00a420bce812a48ed8355340b3463820d722fcea33b3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:07:21Z), 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/USL4Q2307834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb1014b0568891620c0413f7d30154e0c7bbcaf1a8d3de61c78e80adcb24cb2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMH92370432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41377c47ca61de14f9adff47a8eb5115e1d6b320038e47f1c085ca820f15be8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USMH92370433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33900d3c3071f731ed6df5207f14a78f58437b9ca14d2f5a11470ecf143f009. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMH92370434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9470f108dbd48e491c8851eed269675d9ca0cb1a1891d8ace8481e14ad18c0af. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMH92370435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b35ed2189462c2a263ca43ad28b6330ddd3de4e9eb4cd322e4189c5152dbc7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMH92370436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05aee9b6419dd9f2f6f9387e751407ba63d1df7b5c307f0b56fdd9644b78bbee. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMH92370437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a2a119a880cfb16b2321f167dec72aa18082a0aa83625608073b6b4560979f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMH92370438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a57af427ab4d9acdcecbb9bc1990f3c9dc8ce40525a4a05d3a348493fbbc717. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMH92370439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5588274ebceb75047b4c171f6c24f283bf126f39249ec3b55872873a0e525c62. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMH92370440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee303322daf3727d7c9abef98ec10e6baf75315fde26fdd4eee2f9a329df90c. 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/USCGJ2389714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93f999cb4821eb37b846862e14b1d9697836228c61747c2c7267f5fdd0753cc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USDY42330565.