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 0xcb6476735d4732736f28e61932347beeda6e8de32303e6bcc0120e7ad0c26fcb. 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/29e54e9f-d288-4f11-88d6-b83f8f3efc7a.json and https://artists.proofprofile.net/proofs/artist/29e54e9f-d288-4f11-88d6-b83f8f3efc7a.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 0xa56a1228460091d661e249efb3b5474460c48928cd893e77a96446601e8145a5. 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/MYUM70900051.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56a1228460091d661e249efb3b5474460c48928cd893e77a96446601e8145a5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MYUM70900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57134e0960e0622b315df09a06bcb989aecde673c57b0468c01a564d11bbac27. 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/MYUM70600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb621992544670945c172f7395bc36dacc195ac98e980375c039a0dc0e26bf068. 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/MYUM70600090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb7d957ab5ad4c2eef396d814dfa6eb1a2bfc8abf69322d51d3997e65645c1c. 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/MYUM71000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b95c3c33285c99590481633d94b11d33d734ce7dd3db8ff45ae326f6a974b0. 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/MYUM70600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a981048164d96daa35eb965ac3ae1e37a3b270b136e4b3e117ae893cc9f623. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MYUM70900053.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b0ba7efff2867bbb74db1f31aba00e929a28bdfa7426dc4f39414b34867554. 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/MYUM71500547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3d73bf8c0772fc03759dfdbe893a2ae5bf71407c62188057b282495e9dbbe5. 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/MYUM71500550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2907307cca361808a2a7348dee3fb3704a413be903aea92142194b69943037b. 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/MYUM71500551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc5361a28636a88a8a5503bb33f1450491d5a277ce6b188ec8555d870759acb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MYUM71500553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881adc6be8ddaf92d96e9c244acbda8c2581cee6237934766bf04ab015e93f8d. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:35:32Z), 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/MYUM71500554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9631f82a6598baace6fde3edc4457f4e7e61a60be4afb34a86d1c2cb920b5e. 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/SGA037301392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecffba91acf0e59805cb2f13c1a3f54c2e4230cae8de42d3c969cf06a44d98f9. 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/MYEM10700218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46733979396f96acad0bfe7802427730bf8a69624bf80ab0a5e4451eedfbaf35. 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/MYUM71000546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316be762083756bf9a7782882e778d499bb11205dcb82a40d6546f18f20bef5f. 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/MYUM70600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8846894f6496558360b786e991bc19d971abccb121cb3c784317283a24fe4f1c. 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/MYUM70900458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7786f9d2aa7c07576187a1d2ba3a8422dd6863f9e497f7eec7180de16640374e. 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/MYUM71001455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6503ca94067ca0226ec7bd01779282d6c3c7177de678383094f3153d88b6a2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MYEM18500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8306b6c6eff5c4540710bf51af672d4244fa8e5cdf82d89f6e9754d705994e6. 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/MYUM71000537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f3286169132d8ca7c96d2f167120f4a8427576c79db821072a32f4afec34b9. 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/MYEM18200012.