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 0x7a4e74eccaae598cae53af9e3d58f91a3f8f0b362275f5c394f35d53926c3296. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e426a857-d451-499d-ac96-990df0a3b68e.json and https://artists.proofprofile.net/proofs/artist/e426a857-d451-499d-ac96-990df0a3b68e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x0930c7811bd8c14141753f560b1aec48922537f65dfcb30be1c0c51796dbbb37. 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/QM4TX2012080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612df9d3311c6177427d970620f285f577c93230770e9f2b3efaea987a319e78. 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/QM4TX2012085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5444adbd90cf73c95c0e49b7a727eed56c7a61830dae5249f08d8a7aedb90ba. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QM4TX2012824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826aa3a423c59cdd401ef8860bb28be108717237fba43c5747bca00360a10b6d. 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/ARW861800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907791bdd70d23b47db1d219c130f0d70c4919aad2f0be2099498cf1276a5904. 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/ARW861800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084f688222c6049e153f46cd2505a9b19297b55fa2b8551e39db89dfa4541947. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/ARW861800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07121c1877a9fb19294173ee63d0ee0764548b97516c35af1ba91c1879aa5817. 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/ARW861800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d136ed90499a34128f806995617fbf4a8599dec4d7e3f8ccbe62b4971f1b8b. 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/ARW861800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83f6a5e624223ec031177381ba3da0ea5ac4032bc4258c0b4bae3cabbb55d60. 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/ARW861800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5df7eedcbc4f093d98cb193572f39536cead913ec0f82bf941f18d7095c3a1a. 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/ARW861800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af7edb6834a98640e54240cc8a388307dbc23a696fc8ebabcd43e387e4c2957. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/ARW861800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f34df56e7821a5da900f600b46888705db74d47a1da18b04ee56af20387f21. 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/ARW861800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d613713f29757977a7d93ffb7a602bc8cc9927c4c54d6b13a0a5f211c9bbe1. 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/ARW861800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865e4e07480fa5da4896632b1b8cc96ed7fe24eef4943fae0159bc02c5dd2018. 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/ARW862400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5430d1a8f7e9e3e6ee752e4ab8d3f599dcf75a00f3560f0d168d4fe0234b1a. 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/ARW862300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383ec09feaa5abd019703861665c16e1ece3737719d4119b6228bb034c4fb75d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ARW862200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0625221240002a49ab81c8eb84ded21645908d0f2fb81f4ef9ba9885c3aba524. 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/ARW862100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b89bc5e2811ae5dd4a17d8da3230c11219d20fed238e9a0fa466a072353437. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ARW862000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6309f90205ef74d69fdfd004844bf1215baa6f4feec9ad97cf86f012a4c0916. 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/ARW862000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc37da3fedfab83601e90c976fafbf5fdae8a6cabcb84ffc2f08dc37d4eba495. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QMFME1931056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd58ca4f5eb5d223e7b1346e6e125792ea9d06543f48d5976d539b40c0ee02d. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ARW861900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92b75f8236606d6eb129d06bbbb1231085e015995f383a991c3e65decf1799b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/US7VG1969726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953f082f602d4323e5dd262cd36f13f62288890e3b6f87a5ea3cac77be30e28d. 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/AR7021700444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58fc0f889283bd12e28ecf2e5373c44f0f7bc09fc7e1badb3a422f0ac71ee24. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ARNL72400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365071a302bb73941f86347307db34a0e594c3f3661fad1020766c2787666d2a. 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/ARNL72400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02e8b1786ce5e5a7cfb393ad3c2d3bb24c28fb043320134b0f931d3c0ed01c5. 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/ARNL72400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6524c04f5b17e8191d2eb22ee8b3f9a332eb91d329513160a1af2a8013928b. 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/ARNL72400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f58d5a03e9632e3d18e29e9c22696ec9f3360b8d44dcb90c509f9a8130bc0ff. 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/ARNL72400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525acae37de2c0dc01e104677ce73e2f5b9f9aedcaf8ee7922da6b985e0fa30a. 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/ARNL72400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c5f6b8fcbca8a75ec5f3dfaec9ad9d2f796bc2f0148081cdf57c6f188ee3dd. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/ARNL72400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95012b7d195c3972fe3063a9ab3a48c1185dbe78e50488a23d43bc0dad606fcd. 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/ARNL72400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b582bd1ee983da4217c93e76098260516e371ede7c9de33f7d5608518f07a9. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ARNL72400009.