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 0x201f25d6ba5914d444adbb6fdd116ffba5a81f8192309f4c7596a97e8b36f487. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea73abd1-6c4a-4f0b-893c-8ca82fd2f5e5.json and https://artists.proofprofile.net/proofs/artist/ea73abd1-6c4a-4f0b-893c-8ca82fd2f5e5.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 0x8c85a3db99ce4e8601cdfdfb5d1914ed7a131ce28007f8a42dc1f05b419a8d72. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX282341858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa955f9e903fa5b14d22812e0a17f1b1063d5a7597fb6e189ecefb331d726e841. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/FRX282341859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93d1a2c891e03ededcd791442107165bd498788eac290d72b67b2f9f001e235. 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/FRX282341860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501a2e9157ff1a7143f4f83554e30e8f1e8cf9a612fb6268fa28207691f292ea. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FRX282341861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31e484034bbb1dc4b4fd3776e90e5d7cffcedf07109715452935384090f24d8. 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/FRX282341862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ab77631aa8daa3a71400cfad29127d1faa381e5a1418e9ed1705dfb4709544. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRX282341863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6679deb5f1ee2729db317e571d1dfe06423fd9d3a9ef3456a91441c9b31eeff4. 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/FRX282341864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc2302a5f2221c3b24dc9a85ab4437b5cafbe3c87fa64be7c81385fd2434501. 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/FRX282341865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c6b5668fdc45f07e97bde514193be2fec6bf7ba78aca17f43f70d7b9f6854e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FRX282341866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e77af85efb0c771cac2faa829136bc66b1308e141e7ce4b74c62e6939e8533. 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/FRX282341867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bb83eaac8d37093a9621a77192db8478eff84b3207adc11484473de65c3930. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ITB551514293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fba4d609e6d4208060a9272a6cb2234e55d9a5abe84f838f60ac3264e94441b. 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/ITB551514294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0160012b4d976f447a92267f9dfae38ffb1ace61bd0cb65c44d742814e8ed6df. 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/ITB551514295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8ace7273c4e92a7801dad9df884be9f59133cc9e2cc62f4404964441d89983. 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/ITB551514296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0880817756b325985115f127ba53573957d820489a785aa92d4899dde4535ff5. 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/ITB551514297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2816fad7af6f4241b1e5b0d8e15ea6f1a1fd94a766611c081f40dc3f766f8f7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ITB551514298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fea3fe3c6a18b6fd0bcec15a56f2cb9ed0bb88fc36da314fe7b14916bd98895. 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/ITB551514299.
Assenzio Senza Zucchero - Prod. Gionni Gioielli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1abde17eef1829c3d9949a0157acb3ad9b7acbe8f6db393c3a71326ff0f1f49. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ITB551514300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba766352149e68af1422a9958a2752ae4b66e057e800dd7733ae109d5dccf7df. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/ITB551514301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a3ed31700c84aadfce901404847dc3e411dfd764c43586b413b5bf451b8cfc. 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/ITB551514302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85533e3b74003f1ab2b369cb38cbec1a515e98f75281dfc14ad0059ae760437b. 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/ITB551514304.