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 0x5a212f745c171c35ee5d3678fb881a9481c3de397c63848ebe7acea670235ffb. 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/51e4c5b8-fac3-46d7-94b8-e1ba1a4b7f75.json and https://artists.proofprofile.net/proofs/artist/51e4c5b8-fac3-46d7-94b8-e1ba1a4b7f75.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 0xf87a51f34df33b0659d636c36dc65a77161a4f6e6925d11df8d7e0d812403411. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QM84B2154001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2454831adc3893d06731054ed3864962234acb25c5a2ca77ad03a795d69ea4db. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QM84B2154002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73633c5851bd161c2e8424205971ec2e025ccb6bdd2b0978f2bc41b1e9fd8cb7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM84B2154003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd6a2abb487f0a3e7ed7760c3669e01301ac97e1b51b2f1703e390efc8ad43c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QM84B2154005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4f8ab1c1bc80637bf1e207e4034ad0917b770f794dc07e57f69ad5dd8583b8. 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/QM84B2154006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fa7d6d89497779dcd87419dce75308e4ab3595911d17ff848cd4908e640513. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QM84B2154008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b40933f4dcc32d67b9fcafdfb66905bacfcc4d124d865f1c0262838175381c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM84B2154010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06255134dee2fb7542256240bda22c605b5acef5036566a478289ede61369eb7. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QM84B2154011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87a51f34df33b0659d636c36dc65a77161a4f6e6925d11df8d7e0d812403411. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM84B2154001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd6a2abb487f0a3e7ed7760c3669e01301ac97e1b51b2f1703e390efc8ad43c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM84B2154005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fa7d6d89497779dcd87419dce75308e4ab3595911d17ff848cd4908e640513. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QM84B2154008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b40933f4dcc32d67b9fcafdfb66905bacfcc4d124d865f1c0262838175381c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM84B2154010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6613be40566fec506c4640f0a9b0fd8300bf67317e9877deb208ae0192a8b8f4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QM84B2371001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5044776c6257cf2d96da96525f8c2a9145c02b73e7b850b2f3f90bbb5fdd9c48. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QM84B2371002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b12fdfc3547027da8d74f5eec8429966c191d53db29f9892e283e9be6bfbd0. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QM84B2371003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362a4cf5ba25b186bf153146fde6d7e191c79cb4bde53cd63a87643b4eaa48c0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QM84B2371004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c40f00fc413ba29495bc62023f0ffd60849a5b06675afcd9561e0ad7603181. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM84B2371005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f9dca9bc795dcadf78ad060eae18ef21a2dfaaa4f11e5be764b3ac02ec4641. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM84B2371008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6613be40566fec506c4640f0a9b0fd8300bf67317e9877deb208ae0192a8b8f4. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QM84B2371001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5044776c6257cf2d96da96525f8c2a9145c02b73e7b850b2f3f90bbb5fdd9c48. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QM84B2371002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b12fdfc3547027da8d74f5eec8429966c191d53db29f9892e283e9be6bfbd0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM84B2371003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362a4cf5ba25b186bf153146fde6d7e191c79cb4bde53cd63a87643b4eaa48c0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QM84B2371004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c40f00fc413ba29495bc62023f0ffd60849a5b06675afcd9561e0ad7603181. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QM84B2371005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa539f19b956081b9be99d09e803a0744ed16332f692b09e98c4970bc4c31a590. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QM84B2371007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f9dca9bc795dcadf78ad060eae18ef21a2dfaaa4f11e5be764b3ac02ec4641. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM84B2371008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd310f70f87e2d0bb34c7e81ce7fa701fb2d3bfb4376afe067e7f67d95ed8b53d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM84B2371009.