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 0x606f328c2d5bc4439f3359e61aeb254762187b85d6a656ca8aa6a3459297d608. 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/459a0bdc-5172-4c35-b8eb-a7ecf4e58426.json and https://artists.proofprofile.net/proofs/artist/459a0bdc-5172-4c35-b8eb-a7ecf4e58426.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 0x68716aca6dfc8b5757be09b8a2b8c172917a3e3b842fbd7be33f15affec77620. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TR3431300461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9369e8c89701e56e56ee52089642879d142917d4980a26c522843738e6dc147a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TR3431300462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6678fbd161e92744bb3625ffe130c76a1f28a83f45b0f08b045e28e069318d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TR0331811218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18817c166112efcf0d3a5e1ed96b102ca9967f537af45108801cc70138a19eda. 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/QZFZ22399493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf73f59953e7b3f422eb0dab08d72e353564a5e57e6e5283878c2f67097979c. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNWW2373185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e8ffcb0422e8e171c5194eec5fae5054f2282c06626b7b57a614dc0928924c. 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/TR3432301899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d892ecc145b263784ab0af4636d3fa61a37e4378c5d6b86782dafdfba7125e. 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/TRCEI2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4b101fe9336b45077e6a2ea5a583aa616ab0be9ef821025c6386652ac24838. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZDA72548937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b6b55e6cfbfb0e633b2101914f158af88f8e4fbf1bbc6746d2969094ddbe72. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/QZDA62594496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a90f01236062b6f3600389328a21c5fe4e1f9f816079a09233862a5a8aab410. 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/QZDA72503834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e90c7d9df2e63e67cc6e0e44a9503cc4d824c5ab04b4dace50a61e43bf628d. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:44:24Z), 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/QZDA62594504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5509f0c5961f0ad89e591e689f18efbdeb6a1b94e790f02ce393a8f7c48f42. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB62574741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d797da9f1250752cadd78ba545c2b15eb938555da9c145bf7b0d4e0bebe9aa5. 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/TRCEZ2500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5312088498ed234d92003e51b4619e9006f9fca3845cf77de567f8ae09e4388a. 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/TR2200900590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63b121d272cb66bb10d259221bc78ae157662de7c2f0f84834360e60adc752f. 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/TR2200900594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb583cecc974cd972c0ea6eb6d4b59918555e429bef42d89588df92df14f10007. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TR0331911748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f60f0080a62dd04e42586cc1415a2650eaa44d4af80a5255edd6566a230ffd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM7281904532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf936cb28d8e5ebec7e85b29bb29d6d63f6e1c754859ff0a8b8560eaf45fe4b79. 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/TR9932200555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cbcb6f75f5cc7e2ace8d42f9d778ba8dede58273c1f83471f65ce867fa072d. 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/DEXD61800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea2f46065264b1a74afee3b9551ff31e9ce81d8a52d87467f445c78644d66a4. 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/TR0331811526.
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 0x9a9c8b55ddfb93479d4564233aa944b11453dacdc5098a5d2541b3b7237b8531. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TR0331811418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131baf453779d5fa2f9b63c3eb976ceb01745d346decab9d7acd68975131ca91. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TR0331610769.