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 0x6a5ec9c5eb11047e092fd11adbbb6dc7f625d5d8beacd26d19a8141dfd47b7ff. 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/2a65bcde-b0c5-4dbc-bf8b-252e29da4676.json and https://artists.proofprofile.net/proofs/artist/2a65bcde-b0c5-4dbc-bf8b-252e29da4676.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Arauca, Llano y Folclor (El Romántico del Llano)
El Romantico del Llano - Tiempos Dorados, Vol. 1
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 0xccf0f6742435e8c8cdf13349aa40ba4581bbc1a671e7b4ca6ae9100d56a2869e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/COF019901174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e469e764498f510823ef633e80030e08911a35fb34465c95ffe29684324303. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/COF019901307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf414aa0e0da872dbc0d57e6fc28b43cc01732a8b766911dca5f5df0d00ed6324. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/COF010501648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207242363293a4b7e5500440806430e0e6f7b62a1fe38c82d1bf03dc82522b32. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAFG2062977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2734d0065d00c206fdc1f21d4649e905b0c1b1168634539f8130cda118f46e. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/TCAFG2062981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf013bed3f0d388f1973fd439edc4ad17a1f63d8cc57372982b19c06cd4b797a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAFG2062984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c2ffcca5685da4d95266795c2899ec2bedb42f61ea72c9299fc1403ac2bf04. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAFG2063058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac67cc51d5b866f172dda13b06220e13ccc1a7f63ffb7f2459e59eca87ab05b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAFG2063090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e392ebd8638f6264821ad01055439f513fe9dc5c5e5a0c972d304c8549c441f. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/TCAFG2063099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64784946ae702c84a6ed883ab893965612f65fc492ddea2bfeec24ff010a99a7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAFG2063100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7042706b4a3cb582becbefa97b021c9d3461670126c0f6a23145300248396ecd. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZES82113972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0b02a45325f88c0c50cbb7f78961492f5622e5d2c7b7ac8ba5b5c6655ecd60. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZES82113996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a3a2bb25f0bc3bf248131d1fc87007dd74f2c2f2de3f108513e4afc1c49ce4. 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/COFC18505603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fb3c32309f7b4adce6485543e304cf77112f4825becf8e141cddbf5ca10aae. 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/COFC18505612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435089d203377ff6d5641c8283cd189f7bee85e4f9fbfbb634874ffb2e21cfcf. 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/COFC18102410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9e4bc0d37ba6f042086ee51cfada1f353ad6b2ecfc818afa0a2d56199cfc1d. 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/COFC19500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e30abf39ef48a42befb0293af204e871e52ee24fe7b4e885804a7a7cf615dec. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/COFC10910218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700f421f5420824bd55de8f1507dce585e9d5319ad5c60eec74e8a70e05a4fbd. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/COFC19600210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6671e0da78529879500bb3b2c8d353aba0ac5d46bd5c00a7c412b89591f51d68. 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/COFC19007006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d968e2ce973dddabaf02593dd8a46dece78771a518dc8a8cf301379187405e3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/COFC18505302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab1162061b5a8ed3328e4ea28aa9c1a587b807889b806944bfe8ac24fee9518. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/COFC18505304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef8456a69b9911a97a592008ca45c9361f198406260eb2bd1b431dd71d5df6f. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/COFC18505306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919822a89ee498a1a2fa5e365a3ac93565aa7c170bef3295af4670809862b7df. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/COFC18102608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1cebfffcfab36f2e12f05428f98e172e4278b41a9768ecec59cf4fe383c9d1. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/COFC18102611.