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 0xaf89bf0edc746b89d95dfc019a403672506bde7fd73a299d844a6f330fe054a0. 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/5c53d3bd-89a6-4b3e-b10c-913d190045ff.json and https://artists.proofprofile.net/proofs/artist/5c53d3bd-89a6-4b3e-b10c-913d190045ff.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 0x3639ab26b28d062a43267c4918462858997113265db6481843a4e67ab6b410f2. 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/TCAFQ2172630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bd5fd18dafb9c2e5756fc5fe734a3128fea11d0e6c9965fdfbbd2f442f9017. 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/TCAFQ2172647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca2ecc28d4ae3c75b2031ddf70d486568b2f30c36cd4e992e86bec3003b8c70. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAFQ2172611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e20bb95e3a2f56caac14cff5f5ff9efe87c9e7b514a5b81bcc7b8a7dd791a1. 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/TCAFQ2172657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b67b54e586b554c8ad45a5076e98a733111f8587165d0e7e8979861b9bc926e. 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/TCAFQ2172618.
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 0xff697960b3c7a4386d4b3917acbac1e219c77aa3886ca75dde874ebe975d0716. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAFQ2172621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193a633825c713b8ce5877f6a9fc7078ba0900efff6fbe9aeabc34d0c7548dc3. 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/TCAFQ2172625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507fed15154a5f5d872c2581e0b3e7cbc600a865f5127ca79983b1a4da71b0e5. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/TCAFQ2172641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e54062d8c36ae34b530a07dc724334f9edb8a0efa0b2b0c303671e47773e9d. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TCAFQ2172651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f510ead672c8f82c4e2f4487beaf7a799990c5af8c0c84eb746d5a3a9de9b25. 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/TCAFQ2172653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bb2ee44c4dda97244aeb6ea4e2c5538c953bfa9e0ce396bcbd705c417d9006. 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/TCADT1826701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9474769b1f68f03d86a5c5256f6a092503ccf877339f24981082172ab9d73117. 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/TCADT1826712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35e2a616b01bd486adc6186910eb9478942820ba3ff60bedf4c9727c43f4e5c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:01:47Z), 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/TCADT1826715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f71ea8d312b378e85f1c8ac104bc18805281aa5bda8ea2b6a6888dc76bb5b33. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCADT1826714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530eed29f22782cf02a6c0ef6ecb9587b246d0bbf59de9f5fe05670b5437e701. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/TCADT1826716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47edf462bed36b6da7a09554ae8e1452439c47411e8c3fb1326a926e711ac83c. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCADT1826718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa373fbf047cbf4e2e95d270327dd46dbe52072d5f1ea0f1538dcf509aadbb587. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCADT1826719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f3e50d2aac6e66c1b6858779d499dcc90587873ae5b5c711debc2bef52b999. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCADT1826720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537315a1b90c9744d00d2863b1bdfefa852dd0ad4660582b0180779787c7d2d4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCADT1826721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74786cab08d52a38d2d7eb28a18f558deab4dff388ef0af30b8e5951e97694e. 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/TCAEP2072947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea53b06275eaf5642fba99fcc3f2c4ba46f47d0fdb7d0431879add4a1ed2dda1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEP2072979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974f93816e1a0c3594a2bb7bcda777fff2e5b2bba465c70241544dc8eab04036. 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/TCAEP2072944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4586be3b44d9269b48234ee60eebc84f53033eaaa9f7c0013ad21ef22d6b5708. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEP2072975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1a6bfd84918a2b91555015473377f653566209ec96ee67e2f7f959fd82dd65. 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/TCAEP2072929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bd7255b6815a1fa9d0a579563d047b9f19efac490102eb1bc959220580c1cd. 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/TCAEP2072962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f112cba90d2619239d2f47b53676c844a7a3dfa2a9ae337025e182c8a456ac. 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/TCAEP2072955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4744f0f690b142ceeba3e4d0b314ba9ebaaee2695a9e9928b529d3e0213ce4. 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/TCAEP2073002.