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 0xa4156869c17884b8702f88b890a682f950c8b2fc6e104f954441f321a1142279. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e92690b-6331-4c59-ba41-efd962264c55.json and https://artists.proofprofile.net/proofs/artist/6e92690b-6331-4c59-ba41-efd962264c55.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 0xba7ba603034784f9b4a3d8c34f833372d407344fa19a1704a3a76016060985f8. 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/BCHFD2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89344cd1420052b3b7bd7e8d15aca9cf86b8142c3fe8656b88707dc2e7aebf9. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/BCHFD2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7bf839bc3f9e514a75a9b7c148a89b9d7b484393dd86869145ab69713f4065. 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/BCHFD2400224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c73fe1f37dab2438bef5c77ea5b4afbd71b85f4c67b26ffb1296e63a6a19da. 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/BCHFD2400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cc5cef5b31848469b9e289db34200a5ffd5c202877b6f429e84d217e84e5bf. 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/BCHFD2400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7291f024925bb5fe002e87a63343a8484232beed9e9027a4dbde2630c9457db0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BCHFD2400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e2113cc12b5fce205a14f85a61251d9732548ef6f2c2038898392fcd84f810. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BCHFD2400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe580d8079bbf53944ccc99f0e726b8cad029448ae3c956f412152a5addc00ee6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BCHFD2400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2794d0361ab2acd1788f64bf19d4e1f4ae77b2a0b92261e09f20bd1cec6adfcf. 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/BCHFD2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba728b830fcdeb4fb08af04a99e8d1387c7379b7560b2b2e35e32a2beee0e1d. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BCHFD2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2feee54d1175a21342b926a88c4154782c280c27564de19f4433523c912afc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BCHFD2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a882be89371c4f2ed21008f42a4e13732a4ed9b251ff522fd4335b1cdd7547. 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/BCHFD2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d25ae4b8111508cab3c4b9ed31eae3a749a073416ffb5e12c00a03da9c37082. 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/BCHFD2300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14579655284bf3855e3f707f1a9e5b85ef3d7cd5a0284b550ff1f30062e8646d. 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/BCHFD2300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cd9b8969a7fd392c1ecb25037ce18ff00b1bef62f15c0b01c72d45beef8379. 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/BCHFD2300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5627ead48b8f80979f3ef6636f0e55f095ada44b21bf11c5df0a979986308446. 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/BCHFD2300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b33fc72cd75761796441384032dfda1d5841c47686a1220e804b325da3d2ae3. 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/BCHFD2300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bdc16caebca776bb354dafc745122c57a95bf11c39fcad2f954e94dea723af. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/BCHFD2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee86168a0c8f671f951836e90f13aeec6b82a97ecbdc2c3e40f94efb7daf7c8. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/BCHFD2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72892a83f5f790c5d2967c837cf9ad4300d876d0eb10a045d48be640117d3ad4. 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/BCHFD2200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431f88f349fc13d0867447dba5b4eb7746085ee4815ffadb9658afe9edb98ac1. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BCHFD2200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee936014803c8ff2e8a5af98400d1acd64c677396ba31e72932a7a0cb2671ab. 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/BCHFD2200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b57e383632df6d2490e2d5b750f4d3a3b1f61e755395c08b7c1216a0106a2b. 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/BCHFD2200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6fc970c662ef874d0f7f99110293f05c6ebe56f174729a2fcb82ed1fc75e92. 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/BCHFD2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74efc76cb7b3ea87ab95136a23dfc7f3e64b6973d434bbbf1ea63a02c4fea5c6. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/BCHFD2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534553e0df319d3e97d70ede52e603dcd83ea922da3e1eb5c73e5eeb381eeaa4. 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/BCHFD2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2396a9a2fc94c83e2f7d9cea344d9c5e233d46d29bd8bda7e99f623a9068ba07. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZGLS2159756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465cf39b62a3ed991f3ad64e08cb5c2e20d0664932d5eee4c16d73a01c329e71. 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/BCHFD2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2461a72c2956aa02c002d00787fa30f2a0fa9c969fe7cc9e5a39da0b05bd4d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCHFD2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8389353511c3e4cd6b82770072b90fc21c637cef384c956ee7f6bf0bbdc739. 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/BCHFD2300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6671cb9e327d4578b4e7a0c8780012feaa562f2005e0828e0a0cbff363ca3721. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BCHFD2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4c9d3cd2129c459735135f702cbd9563e91dc8cf8577509a42fb9388151416. 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/BCHFD2300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690ad49c137d3fc9947aea48f03e3a5eef80a7481114220dea9ce80e7b9f233a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BCHFD2300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac8af713c9008409eb2781d88c01e73b50fa4686f75be488a1d1262a4b8aa49. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BCHFD2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ceded24e1585c8ad9d5d16c82ef40466aaa80911a1b943a7a47f43fde4bb99. 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/BCHFD2300055.