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 0xa9f561d2f4bf9400b9f9242b2b92f82474ca757d33a54c7819ac22548ce881a4. 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/eaa07c04-5f41-4c19-b5f3-66eaa631316e.json and https://artists.proofprofile.net/proofs/artist/eaa07c04-5f41-4c19-b5f3-66eaa631316e.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 0x637307f56a37ca8aaa6492c00e1c277f415b0cac9b359e59a697dc52b986e8b6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEW871909320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb7e39a74ec6f1b42491097c35aacc2fa4e8380ba2da8814ed6a7b38261ef14. 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/CH3131915480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d45eeaef927c634bbfcb3ec3b9014de9efa0fa3fa5cbd31075999895f21bab. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:17:35Z), 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/CH3131915482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc70eeb37ea1901a9da6b2312fd94225c805f8a54e5a94c161932ddc93b16abf. 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/CH3132317696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2c984f81120f92b50c81f7afba8b04febee4c1a77fbb76b74567d0fe22aa8f. 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/CH3132317697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bd38912ede5ddd762c36a7ee195e35ed4effba931ed93cb3a4660d6bced42b. 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/GBEWA2303801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9301a731cc26ee404a8efb96fbdb3cb7e3c9f25f0ea94372de663c51bc99a6. 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/GBEWA2303802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccffd8d0540b47ef88e4d6a3fb217c4f6e50a6884b25d3db66fb10ff86ed165f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBEWA2303803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7baa73200b08de85d2ad4a6495aa5efefdf2bda6cc8ff800556bf08fd80182. 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/GBEWA2303812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ee10f75e836210d75908cd1bbc050befa54de6723cd90025bdbdfe4f197767. 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/GBEWA2303804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695ef069b58eeb4ae94eec98b1a668e827dd1829133631b6b5f698a74d0f8753. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBEWA2303805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad03d7f49e58d66b98a6a7dc6b826a73047ea9dd403e03f04cc4c6f897ce5170. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GBEWA2303813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08beb0bc7f3bf87a4c5533916133374e5a07dbdb559d8ffa77dc725b9beaf4c. 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/GBEWA2303806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab4a5697577c1268bddf235719d5a4068f6a2d31819743a2ffcc139bca3dc74. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBEWA2303814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d532dc1a65c4f99227d4d7ea371ee20b7913ecab131c782f07422f639f5532. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:36:27Z), 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/GBEWA2303807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66df7ca34957be652a59d1bd88845ec4b726f71c36953e3eca1467ed9a53cbd6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBKQU2340996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f2c7cf3e41ac4868d15c96e57043aab5cf3095d122f3df51a01006210ac5e9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GBLV62415447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66df7ca34957be652a59d1bd88845ec4b726f71c36953e3eca1467ed9a53cbd6. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:20:00Z), 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/GBKQU2340996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aed8efd9d8b8777eb4223824490c527ca63dc04b32764882b79583e73d7865. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/US38Y2535005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f20a3291f8baab2b30ff69c64c329a89c018afcc193f806074d3219faac37b. 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/GBEWA2303800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaaacd9f089f215104238a34572806c650c3abc285d6235db7b8ba08ea079610. 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/GBEWA2303808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f725533ac524117748a57d1af70b307711a17f8cada6bee98791b66277546d. 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/CH3132116341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51a5430eb0e41286080595de0ea7b9599ce9d37df03e8e71606de5745a422c6. 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/CH3132116342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ef283c7554aecec6dbb025cd0d4fbca2cedb622cbb05496062af2d8ad337de. 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/GBKQU2380357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb7f39de190bb11d28543c976fcdc482a63b72715b646eed0126664c0349c03. 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/DEW872301174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d10b8edea9a16332ec99c8d4ff4479d1f48d849ed3df59c84d834673b0455a4. 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/DEW872301175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaaacd9f089f215104238a34572806c650c3abc285d6235db7b8ba08ea079610. 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/GBEWA2303808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2604735349bd622bd7611a7f26b0ed35355b09fee9608ab4a07239c29e473ae. 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/GBEWA2404312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06db6fb917d9b6500aa585199547bf8c919098b590f06ddea9dc973dea53c77e. 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/GBEWA2306772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f20a3291f8baab2b30ff69c64c329a89c018afcc193f806074d3219faac37b. 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/GBEWA2303800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b52a401bead85cbe75b2e9bc3546fb89cf1f7a13ae84f01e1cab808666fe9da. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBEWA2404097.
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