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 0x89e48611053aa954b4142a5aa91bd362eab6533c957a14435a472a9f0445cbf9. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3d801d3-1560-429a-8cc7-c2d6084211af.json and https://artists.proofprofile.net/proofs/artist/e3d801d3-1560-429a-8cc7-c2d6084211af.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 0xaa40be1ae0bc8ad2551076334a3837259d3c135bc70ae65d0ab7dee23db4e093. 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/QM4TW2451826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5740c9eefd634733f96f1f6a0f2ecd00a0adcffa7518efc6be6615f01f99def4. 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/QM4TW2451833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e83a94eb50ab5e67bc6d1ea11fc1b95b98547c5c9df4c1a9bc4879dc4be0b0. 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/QM4TW2451844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923e32383a7ea929a4a7180c838e515772fee0b6215ec0c4355bbb0a4fc41a1a. 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/QM4TW2451845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c35f3b7b9d4e7fc0a54c09883dad2441bfb5f0f8fbdcfed3c44117bc4c2637. 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/QM4TW2451846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d859449d4a072e8b44e27eea6c9b906f50c5f30339ecccc2165dabdec96791c. 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/QM4TW2451851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb727ba8c92c81212004b4d197bd4fa877fa1f6c76c71ccd4a5a7057a68a6cfff. 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/QM6P42093976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e8c964fbf0cc1e5e322ac387adb5772e352d62600e360821d79bbdedb1bb42. 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/QM6P42093978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1a75ada83bb9db6b251a46c5241a1fd864e431720412e6185e14bea693638c. 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/QM6P42093993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c6d030bc4d3f3bada4ae85294756492577dc46289e116246a9730c7442808b. 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/QM6P42093997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ab2b0e3d0cdef22d96f6272f059e1e858e7ff84ac37bec5faaaa0de23c2507. 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/QM6P42094447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6feeafb9c0c0e90d7e76cfbf3e67556c8353593ce88118e4f798f599efd8dde4. 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/QM6P42094458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efde66f8addef538d8796a93c72b623d1c1fd64455e1c22c755855a374f957d. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QM6P42094450.
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 0x06a865f730c31ea5d3dedf167d1fc572f06aee7c81d012b407b5ca2517d26554. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM6P42094452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9493d54ffa20026ebd9750f3ad7de8af97cba94edc93e460207d19f6d59505c. 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/TCAEZ2043471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56e79e718f79946916b31aaededb0ebc42d334695e5d9a14a7b41ac2863eae8. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/TCAEZ2043492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59f9c0523e49cef3a06b9869585cd928033195103dd3c295e3f2dee15fd0000. 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/QZDA62087889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c804c936ede12a2938f0951f1561a9f614928e35a93b8b4c40b9bad417ffbd1. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ITP841900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b9de5c229211888a1ec50b434c7626db1f76095c31f42a33b2af88e999467d. 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/ITP841900162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7689350a0ddfc105fb4dc9d99986ff5549adb0fc03585e327667a772c2dbb7. 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/ITP841900163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7159ab6c2063d0d8f6499e2b724cbe4559829934abca23e6d2d87d8b7e28ced6. 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/ITP841900164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9ad86dc2138f5abbe159c33842cbc9beaafa6dceec6798fd872cf428e6acb4. 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/ITP841900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fab195a1791e0e016afd68f51398fa4df98dd72cd6797c478a884c594ee823. 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/ITP841900166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd65349735b2dbbc4e631115ef22d3d3f4fbb7727fd3c717d70eea7dabc4627. 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/ITP841900168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61961c9748f3a645d2b2ede29b1cac6c1b138220059d396ad93006db1ba1d985. 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/ITP841900169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60670a0f08bd0a728ed9d4874e219be6ea0c1794bb230a19ac8700205d37f6f. 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/ITP841900170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30798eb3cc6a3ac2a5de2527b67fbe96ea8218b72ea5de259b7bbd8ff905c75. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2429209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6819d5216bfe7552aea5a6454b52bc6b6f9b2506f6e0173b426908cd96bfabb8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA2P2429216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58de526261420fcc48570117d30a7b9dc1a93d5b52439cd7b9f7d5663804e82. 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/USA2P2429212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa53fe44b509e01fb7f531b2ec7062a748607767255a71ce27a102501d02f423. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USA2P2429211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06d6707829cae00610da156b1066812090f18cd25437a81eee657f19c54898e. 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/DKL292200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818687a596147a00f4b5e1065fe227d648b40404c1b9898945cf16f27c6dc7ac. 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/QMDA62176490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587d37f9a05524a48d8c557347e28f50542396e68a2d0b7c423ff0c986bfbe54. 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/QM4TX2201937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f20fbe7d2a17b2e53b87cb6f2e0f3d9a740be4938909af3c7679fb087c0f83c. 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/QM4TW2261012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10f81db3b0600b48974a6ca4c6f038b50e782ea9bc1fb7ab26b88037429b1c3. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QMDA72157453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1b9a48d8add1fb8622b22ebf6d7bf9007e0e6826da1ba194a1938426a16de4. 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/DKP162400803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3a753388219c83b5ab39dde332e2df06db81900522bf302baa0d164417a033. 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/DKP162400805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd663ddd0d246f88b4f130854e73b3b7e8d3a14cb3b878ab906f590c93c5d57f7. 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/DKP162400806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae82605db9cd83c44ae14bb08450c90aab440c852c7da5704f57a8cf65a246e1. 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/DKP162400807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef3bfcebb7e6fe5214b60a607cd0afb3c98af4a71443dd884b2c79ed3298c68. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DKP162400804.