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 0x885249d4a3a3ac1d0535626d0e31769244b188a6452aaf10318dc905f3fab103. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1589e027-ce4e-4be6-b490-611223729e70.json and https://artists.proofprofile.net/proofs/artist/1589e027-ce4e-4be6-b490-611223729e70.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Una Antología de la Música Ciudadana Argentina: Tangos Clásicos (Misceláneas)
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 0x283c6665da97faf9bce4fda648b768d6c805f9efad5048aae9573480e2516ba4. 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/QMBZ91710033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d59a032a6f8b533a537b1101f1876a055b1739cca374ae1cec40e4b0ce3429. 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/ITD541000166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8f5fcf248bc212ef4b5805206e24d2408ea0b53798402dfb482f2a87022586. 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/ITD541000183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684a06c9ae4a98aee2b0c68de6c20b29b6eea5733a3ccf8081f5b46e2d632a4d. 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/ITD541000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace3764e9edb60fc2fda4222224dc5d39d761adc634ec44b9c8cef364df2818e. 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/ITD541000187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5cd81a3dd8b186186ad4a3a7aa016205d42ffde3a8d57db34fc4b27f06b379. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/ARA940600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c5ed59bcea959eaa75d46239a4c9b9d13e98a2ee366b433a8fc9f04d6d8ece. 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/ARA940600062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cb1942a009eb7076c74062c024676f3357070fa10b41b966501dd887f51c3c. 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/ARA940600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3db59adfbd0acf84ac6b351ad41bde53cb9764a15ca3a7c0612467214bea54. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ARA940600060.
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 0xa331076d9468c8f845964b4a62500197fa9771b47a5d97b5ce6aaffc9416ae90. 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/ARA940600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9d80e4315a919285bff3b1f67943e51e632d84adab9875a58f68fa3efdad9f. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/ARA940600063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9fc1c2ce353da066cccd8b050b235a7eec2b79713ef4150e4794e8fc72f41c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ARA940600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda778b862e393dfa77aed3e8ac2b734a72d325db05c3395c1e111d1c53af4265. 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/US6R21505054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24753f098540388c41cb9560bbb8b9e9d010e69a9683e2f9712b758878c385a. 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/US6R21505064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2dee41b87a58348fbb1327d6aaf3e58979aaa417b8c3646ea07e92e9e81c3a. 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/QMFME1547834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935ccdd6247ea14afa255e90bba0a0a403712a2973c7c1c985b893e6d794fe8e. 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/ARF108700178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83096ffbd7340bbd3c857fafcf40f14cc3d3895bcd79955869bd0ac4de82700c. 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/ARF108700182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15188627d068682975cb9431eb3ecd5623dcdf9b639dcf6191be69f5fe609e41. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ARF108700179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377c33d867223a10c72a979c367f573742d2767ca7d9b1b3ee98a1e3732b1770. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ARF108700184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3de478f323ed1d7dac22fbe8ad2a1b98cbe0c8edf10224adb3f7b3a00ab2e7. 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/ARF108700185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6b8fee147c419022f4cb5d62c68e7360b50ddef0e31b48a1f68c495db30c49. 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/ARF049500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9533d0be9648312a573c8a35f62f0c6049cef14ce745a765d37efcff9db3e29. 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/ARF049500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39764d195fcc3c374055866041d6057a8b39563296d661275a54e5e0e54d61fe. 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/ARF049500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4de8c125bc4529e3c8eb8787fcc4e7405cdccf73152ce8cc3027d04ff1a9ff. 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/ARF049500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0cd6b41ce72c20c01eaab649720c86d4a67f67a81c14754f6a85925cbd1aa9. 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/ARF049500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691009f7d3ebcaf6ea97a480dea9755ee03db3257601afa4380f8b900610d8fa. 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/ARF049500074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd322f398f58b284a764cfb90b00e1565bec64e9e470a65f3f52e72c4ff9720a. 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/ARF049500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654a9788ccab829ebf007e407038d416db504ff0202c51a9687bab1fce3d033e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ARF049500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ed39697ddd1856dd15e267900eb9205673d67d0dc53d7344c7993eed64e40e. 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/ARF049500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6258e02fa9100169307f09be43ae8788fc18ef81ae3e83429168433363fcc4. 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/ARF049500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2835d16718f6fd8a753875d601a910f3109aa6181f45c76b0a18e6f5a989f1. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/ARF049500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76892d4034c5829b60e4dabbb57222132c3615a07ee52406dc38d0b2e7755fca. 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/ITJ641800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b71b2e556c9e7c5f9ed29443effae9bf2629a4379df71741fd49f2b83692d46. 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/ITJ641800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93db7d907e8a256099f682d4db2184904d6f05b78bbfc6ef02d75adbc8fe5026. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ITJ641800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4171579aa57fdfe6db400227359ebc383144af3f695cbf4cced58ae719c28c8. 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/AR8L71402582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c812ba379e598ed806879fd7a12686591c92e938455566a03a70dc96df122b6. 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/AR8L71402583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ed8e83eed96fbb8262a8f1863aefe11fc41c0837632aa77b5eb42b0e1ffd18. 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/AR8L71402592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ad3b97bbdff39a9f4b54e3297fc568066134ec12a30c11de71c3e23414a31a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/AR8L71402586.