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 0xfb0b3d62ef93d60e159b96c8ff7fd445e323e435088adc5fbeea3d942b795b1f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cfd11e6-fb60-4458-a9f9-197fd7ce14b8.json and https://artists.proofprofile.net/proofs/artist/7cfd11e6-fb60-4458-a9f9-197fd7ce14b8.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 0xd07f29fd55fc2f8a3c0fba8643fabe22800d0ab80e0fac2069397e1e866ff64e. 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/GBHFW2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1dc35c7e340d2764aa2b63faa589f6b26f77e65dcc0e9535c15d552737d871. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBHFW2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fde73af21c9922e9ecb80c84bedf5dd447adf2d375d1ea654b99cd9b9c858cf. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBHFW2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4912b3b2a8ce917397f4de00753cf6ebe84b0747ebb7f8c1d0fb18c676a0cd36. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBHFW2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7eebcdc82dfff188e8b79cddcf75d905fa6f3471c3506d5941f195aff57b574. 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/GBHFW2100012.
Sternentreiben - (Patrice Bäumel Remix) [Mixed]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb7f87902ca077c7507947c76fe6833e5887a945eceb171cb9c82ea9aeef664. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBHFW2100029.
Hide & Seek (feat. Dax) - [Paul Hazendonk Vocal Mix] [Mixed]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f255d72803573f7b8616125d3edba9b4ef0bca608b7139340efa101712a171. 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/GBHFW2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccb1028c37aa5cb4b6bb7e83db005ebc7fe161acfe6a10a0197da1efb560d2d. 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/GBHFW2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cd3df71448f145dc6f6c31854faedadab166fa75c629ef91c22a48c66ec385. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBHFW2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc0fc12683421bd5bfecef0addcc22e275e604d68031563d0913fe4ce093466. 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/GBHFW2100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bcdd08f8262a6907457aea52a3e80695113b7cd2517a23d02c48ba199c3ee3. 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/GBHFW2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d55e7ec3660b5d4622608c018a5dd11007dc80eb9acce88ae10099f8c1e828. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBHFW2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc07e033ec1612ba993ac05e8d182fc5bc1fd355d650bdef204a22e9005ee6d. 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/GBHFW2100016.
It's Too Late To Call The Police (feat. Starving Yet Full) - [Mixed]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0eed378e53567f6a100c9ea4b0af426ab1dc5a3861bf7cd4430a8a3c4c6b732. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/GBHFW2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb533a1bcea8f4f840ac41be978f337b542f3f5f71a9caa7ae795af97a07b359e. 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/GBHFW2100017.
People Government - (Remastered 2020) [Mixed]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2671a9e93dcf3510b2042ca6054d3ff41006027574b5723ce8a3b4b7e3e2a10b. 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/GBHFW2100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea0459538550bfb70b5b5d59ee84fdf176da598f727946f4db55fd901b3f163. 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/GBHFW2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81794ed4f55f97c7bcf9b741ecf2cbaa4d3c65b25e17d1bcc04a772b28108b7e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBHFW2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a63a3f78326cff147b02e24e5aaad233456094b0f816f5fc15dbc5216380b13. 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/GBHFW2100019.
This Is Real (feat. Sian Evans) - [Mixed]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087fab7c7b0f0d4b067457a4a53e72d4fa676434225aaf0e4627c711809d29ae. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBHFW2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdf0777d1bba742150bff271e90f756b7d4ad3476bef2c5e2b6664192e15c1c. 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/GBHFW2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ec682af634a87dd7b0a33683741b59e68b1b3c15aa36eb88819ce9972e74b5. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBHFW2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d239b8d330cdabe4053e59f3c270339714b841a0c71d09408475f5fc5e11be. 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/GBHFW2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba33ac79bffab86de6a135685f48dcbc8a6aebaf84fab9c0c4ddb0122ff02e22. 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/GBHFW2100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea528c44a4a257c338f0e9cdd0bbfe2eebdac5ebae776987e6083304f8e3e13. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBHFW2100023.
No Silence (feat. Kuoko) - [Super Flu Remix] [Mixed]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1186db9947d92b3f28c109dbb496821ded16992803891ad369851447c4935347. 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/GBHFW2100040.
My Way (feat. I Am Halo) - [Einmusik Remix] [Mixed]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5908193232480e797db08aeb988e5764bc297fe739b3a581ac5052f253b7d9ea. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBHFW2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a6b9296fc84322f41d8aca8037e7254f616bfb312d7dbaaaeea18544580bd0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBHFW2100041.
Numbers (feat. Odd Beholder) - [Kölsch Remix] [Mixed]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc32b15e232e8692221684233af5ae607992795b940dca4225b66f14afd2b1ff. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBHFW2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a23487bfcfa006bff39cc3bbaae52d2a7845166010022e8d621e93d02bbc011. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBHFW2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045ad1b1804e371ca6d88e60210e2deb6c0a8e589064e98f1fec84465dbec257. 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/DEU672002178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4629137cbef00c00d7bda674e03add6c68b62452df51a4e75567455c3324601. 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/GBHFW2100007.
Make a Show - Malandra Jr. Remix [Mixed]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29375254c6f36e269ace65158788baf9d587f7256687191db9cee90cc95558fa. 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/DEH742222521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27657e6c34cab24f9ee4c056a9f6432afa1f7fe65b2ce21d7086ed003f714cf. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEH742217329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984cefb5df873907cbdb6a0b91dd21a716f925ba9c91645dd01db92f2928fbfd. 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/DEH742033986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76657b3b9bcb21ebd28e36d3707074b7e6fab1d1d711f1da52a5d02f5303d6f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEW872207922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0753b9ce1ea300ef6ae3d98baea86362651de2cc56de88197c6b9e3ff890facf. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEH741918609.