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 0x4e0a7e7d7207a81a831a646935921543cf14bf9beb5c0ba2160563f43c31f031. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8653c46-eb7f-4222-9129-0c4c1cc3449d.json and https://artists.proofprofile.net/proofs/artist/d8653c46-eb7f-4222-9129-0c4c1cc3449d.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 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 0xfc824bc61ba3ca8e479f2546931697edb601d5f023eca278ae8a0b687856c454. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGF2248375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6863ad92d94d6ea60e061958fee997d732e85bcd3a996fd20bb5fa508cfaa80b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAGF2248413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba78f8fa9175315ea62d5a5b12a4448783a523da4ee3a6f61ba7f5ce4afdaf65. 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/TCAGF2248422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6a1db0b80425443a87472dc097934aa5117f632c2b6b04e96a06c506af121e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGF2248424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a56870b366570e6c86d66119ebcd707699a83e03f0baa733311e16aad628a8. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAGF2248438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7dd934a3a2aa8388d1189c7e75b272bf016aff8f0d41bc9c4c3b4db6d7896d. 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/TCAGG2242310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8a0692b02a2f8df7a8f6d9ea4f40e6cf52bc3d2558a5c640b38c83596a8e83. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAGG2265807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81261078f6a4310568c21096daf501a7f7d6f8ac85bfb10c998e07825495cfa7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAGG2265810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03046820ce46d6c6af2293f3ed99b7c3f7e6ef45aff73201d4ff267729a6fb1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAGG2265813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc8f80e5aebe2df5e38990950faaa626acae5e7b36dbe257492b899adcb125a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGG2265820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13efc5d87d9cdf48da808967469dd2cf35496ede4afbe5002f8fd1941f46b7a2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAGG2265827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7857ed1aff17e2a5307d4e0b5262a409c1251bdc68b53c2b6b61cce1dc8dd279. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TCAGG2265830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81739c348d4adf60ead8b18fd9cc40ac0a4761726e539a718ab253bac8f385d7. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAHH2349023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d074772eda3219d16b921b3e65a5a9e9c1623770dcf684454a3e55f74fbcaa. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCAHH2349157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e952a7514c7b3bfbd5a4f30f7cd8de2238ab878ba41ebc2513375bb82f31388. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHH2349162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b22f074facb1ecbc370d86b29b8ab9dea6cbe06f3988133dd1cd90edf5e7617. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHH2349180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430bca0218be91e4ab07608a286412372980a3f275590bf23c3f0784d3a85ab8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAHH2349194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ec3a4ca9fbfe3918f2c4a935c63eab04e25e392902d07be4aa7b42648db73e. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/TCAIX2492015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded08d7b1185417045a93c03032b87ea4e9bf2f4f2d73ddfdab56c753c9bdcce. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCAJP2577690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511f7f5f1b1282fc6be99aa841d51234bd3a450f503158fc1a575389f07a46f7. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/TCAJQ2577739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba267c157ccbc81c40ed2c6a24c9180d71192a60f63e88e83194c6994ec49bd6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAJQ2577774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a52d6376f8145a949a608892b8d827991760e92caf7179f316b403df78bdc6d. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAJQ2577806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0008afca4fea5d992c3f47fb28593a1ce6d0b5d0f7b889e5c7baed2abb545895. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TCAJQ2587659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0627ad4f45a285e0182c0a9b3b17ead5660ba9be98a5a4a63bbb162d0515591f. 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/TCAJQ2587676.