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 0x264ecd4b688a51022979160df59dd8f3870c5d8d85d36c34d05d0225a81e3f71. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55ecfd0d-0772-47aa-8f51-4058c17e9a59.json and https://artists.proofprofile.net/proofs/artist/55ecfd0d-0772-47aa-8f51-4058c17e9a59.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 0xa28cd52c4b1e59212e0c2071373d6c5355979549bb78bb729eaf4f379e96c1b4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB8KE2405789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f456a52f6be88079e7b960f6e8edde1d60a6916a13d538ec53978ab16c4f1e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GB8KE2405790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81367e62378642594d637faaf67f076eb0c9438bac9ccd9ba0c9cc5350267990. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GB8KE2405792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c28842109a25079865ba7658f2875b6a6b67b9423626d44724818a6c95f849b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GB8KE2405788.
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 0x624dea9a5c5113061d5f977e884c4db76551ec163860bd7c22449690380bc405. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GB8KE2405791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cc5114c3c147902607659f94ee8eb994be38523fef8f38d006fb8dd518b327. 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/GBLV62213885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bc4075eb7fa348484acfa98c3cb26b7a9da19b40e1b695ee06e511d635d8a5. 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/GBLV62213886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a38d688b938f9fdf5554b4711eebca58a8fc8e03f97b6ad3ef3141d10ccaa1. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBLV62213887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90ea8e0590cb0e6af43a918bb6ba8a88ac25bd40a0ce1be9e6e840b3a1d7a1d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBLV62213888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae8f4bb90a22d747f147241871ff4f1e6c63c3fbe1798ae39eb7c4786dd4d3f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM42K2261994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61641946f675a38c94f2ea5e2d77916bade12fb1ce6329f584180639467597f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM42K2221267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe494a2552abd9c19d5659e1c5826dcae1ae63b30000db2838fd48b199a15e4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB8KE2410202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c069616652e154aae86953db4042e72c81850758c1238b509c26c003b5e495. 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/GB8KE2410203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874d4eb81d1975d2d9edac33d3fd75b2bc79ea292bea6ecbd1695c61b70f5907. 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/GB8KE2305634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2ffb26f801f1301fe2b3339b2bb446aba2d614718cf77b903fa7a1e7f91536. 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/GB8KE2305636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306113c93a9beb3838e27090fb26b11f3f95dd72a25f8d483966a30d642c9d6d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GB8KE2305631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af97ddaea3557d95e34ecb74d442055f084b0b9de5ab532cc763b0fa6fd6fbf. 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/GBMA22381921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5381d56458c55910c70c925756fdc807c015cfca20a5c2f06a08abdde5bc3cad. 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/GBMA22381924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398e03c24ad6647e6a54db47b6a6e0195a4834ad78d9b2aa55b33f2c4239169c. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:08:43Z), 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/GBMA22381922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e79c27cfc6b4b334a328ec0679d3c8cfb5374ffb4c95bc144dc7e1b169a40ca. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBMA22381923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297dd2df1db54b2e15971e1302e3cfe162438be43b4ace95bea17f9c3444f30c. 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/GB8KE2400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfedbc11c16c4577a50994e38e5c3b9c7dfc889005308f42d278e9c83f5c4f95. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GB8KE2400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3bb6301c1b0b65b3b6100c007ab18fba3319a52816df1b2e6311c913211806. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB8KE2202885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49756999ef189ca2a078d65d3928f36318a883f207f448507621d243894dc75f. 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/GB8KE2202886.