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 0x47a71feff79facc6911e5aca04d55305833ce8b40ba0ce35102f0084068283cf. 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/122afa75-e424-43b5-a3e9-82cf85cbe3bc.json and https://artists.proofprofile.net/proofs/artist/122afa75-e424-43b5-a3e9-82cf85cbe3bc.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 0xd5118d4cf7ad9b16e6ddff1f023a4b4c1250d3b2b7bc20f1f7eb273d49492a58. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FR5R00911542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f36eb285d580f3235ed307e50714005934d351b04b4e90e71c7f2f617aea04. 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/FR5R00911543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365015bd122de8658928827ab4526c96357538d10b73913c5a545ce99aeabf0a. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/FR5R00911544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca82996f872204a037bbd7ef40932788cb387041330cb544c1e5f149b05c8ae. 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/FR5R00911530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5ecd1d9a497fb643a7dae6bc129a598b3c7ecac75808e589590ad17d01cca2. 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/FR5R00911545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877427ab2bde5f3b016d19fe0cb4c480e82e34736635aabb1d408573e06dc4b9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR5R00911546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43821a76c34276e6ceff8d6125b3f8f78bea59ba97b89649bc2b04ebd8d501cf. 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/FR5R00911547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71789e0e7d39e91de00265cce52ac2b419ee33ca22bc981917111141dd77878f. 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/FR5R00911548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1dc5691e673009f905b3a755bba76e4df8a0b2c8ad473642d475b03e648037. 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/FR5R00911549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d226ea19358574f9f7f49112eccead61181d99aa55619980c1d245418ef9217. 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/FR5R00911550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58e37d001ca971e09114d503c2f8599e80dab56d16ff58121512761f2fa8b05. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FR5R00911551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa95e8bbe97cf7968a97bdf9b8731a7661cab7e94d7e038bd32e68422a0db67. 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/FR5R00911552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392bfb2518cf6769b505fc038c2faa14a98991c88745860b81871a68e1c7fdc2. 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/FR5R00911553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd0381020e5d2dfe68c519515d968c6f602b0999cc2dca7966d28aa6c7a516b. 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/FR5R00911554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54834cccee428e30063edf21290e0120e45819a9aca33e7438007a712684834a. 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/TCAGE2284277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b2bdca07a2a981c0d9820418c9cd0aebbb233744d7ba34f23a9dc4dfd8e735. 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/TCAGE2284280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa4de93e41debdc16ad918e714f1c067e90b7da3b778030b4c987b3f16511b5. 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/TCAGE2284284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59119ea74406c9bef283a6115ee1ec0cc459ee9a424bb74903d91ae4ffbac8bf. 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/TCAGE2284286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f26cc4488583ab313c969f28904ab389e47660b64ab6c4f8e5e7a581a00b17. 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/TCAGE2284300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b7c22a99f92681b6c2f1d4c70b9f8bf24d0dc06ba429833b98f5d08c546fbb. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/TCAGE2284302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e67aec192e51b382d16b5b70c5e416cbd065be6289a72eabdd94f867db970a6. 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/TCAGE2284304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e5d31236b4299175d42d0cb44d9373e0c2331287d0a65b462221b48c9b152f. 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/TCAGE2284306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612b9d5f480892a33aa1f3faefeb0c6b67f2fcfe33814bbe3a559da3b1292a05. 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/TCAGE2284308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf80059ce175ca72a0e98f0c2ba76494d8f849e3a88ed7fc5ad1448b2d1d5814. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCAGE2284311.