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 0x4762bb921eff5ba8a630339fc968d1b3a08d10e54033e9848d8349dd47ca9e5b. 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/8fd4e961-b871-4a66-85ac-fe0d187c227f.json and https://artists.proofprofile.net/proofs/artist/8fd4e961-b871-4a66-85ac-fe0d187c227f.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 0x2edb8d2ff1b63c5296d1f588961240bb9dff3d956b7496496512af627709d464. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCAHN2317698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ab16e77af28a5dd8d23cb409875f78cd816b71face871776ba55986bda99dd. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:41:12Z), 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/TCAHN2317729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777adfe7d942e7da2961f2ffa5c6b86c4d0d4093304520478576a1ea740c9583. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAHN2317742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e8bfbad3c1944aee7d2a68b9af15c50cd52032db5c77f9d4cc460813366869. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:17:19Z), 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/TCAHN2317757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb75158e8d2bf280465a77ceca467adec6374e8d78974cc4c06f54a60b65c44. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:52:42Z), 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/TCAHN2316594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b65f53863313a8bddb05421e0c3e88e8338710e0bf73698bc9ee0e802c557d. 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/TCAHN2316604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6814dff5d5b34b5d755d18efd39bf3a8f1cf377f7b0a3e42c6fc52e68ea319c9. 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/TCAHN2316614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ed2d0481aaa40287ab7b05ad991747369c41ec35605030dc523d4b86af13d8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAHN2316670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3848bdb841c2fda41b8406a485746a0fb9cd4ae3f3f8e454235e7c05dbd800b1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHZ2475116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6be9b9060c6137e9a71ec9b64451792f26dcc81dcb6f7b6e0648e38bd278b79. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAHZ2475152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0784af3a67faa150499087debdf1fba184c21c886be7e834a51c4deb6e76733. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHZ2475193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21466a7410cd2bee6fdcc1bd35627b813c46163d698f69c15c87e87ade5827cf. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAHZ2474930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311849821023802234f0256c72b909efd07a620aa608c8e5d576c8b5eabfb11c. 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/TCAHZ2474936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d73e000313361cb022dab49618de8df350c7b96d1e1d25f1544d3ef65c7352a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAHZ2475019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7983176cbf8be8fc3fb90568deb08f4436c769023528084ac47c15b60866ba99. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAHZ2475023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89075862cbcd79f4b18fd8010e7fb466ff5f5349463736229a1ee440dcad095f. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAHZ2475030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7586ec05fa4e74a3d7a07e90267133cfb9eedf7433957f66a004ae9138da6a29. 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/TCAHZ2475034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d0773266e7a5cf3448d16a5b782e978c1ce854002ba1a8aad113e21cc209c3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAHZ2475038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9736470830206ef9aaba9b5965fa797173d59fa31756245394cd1f260771e8. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:08:16Z), 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/TCAHZ2475041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f06118e9a0232a75bfbbefef88622d28cd3d9410d728be423bee606e6044f2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAHZ2475056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4282ba737901076fc00db94eb1e7351cd80117ff48f2a112654e276e82cfb60d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHZ2474879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfd4da3a4ed8fc2cca7bf341d9b13e394d55d7eae4a4513196dfcc6348713c8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:28:20Z), 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/TCAHZ2474886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9549d0c5b1673dd79411ad973071e4c1641dc891513974ebeaaf1fe322d6257d. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:59:19Z), 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/TCAHZ2474888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaa048e841445b06fc0137a2ac91abd3c403a1ae71f80a832729fdee6197229. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAHZ2474889.