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 0x7f471515820022e6cfc92ac5cecc45388cd9241ed8780e1a3a0014ec5c1d0e58. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4fa73f4-4d58-4f39-aa0f-e026f1d7348e.json and https://artists.proofprofile.net/proofs/artist/d4fa73f4-4d58-4f39-aa0f-e026f1d7348e.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 0xc887aec0d465fc2dbe2050c35f6724a827e1eed72ac78457e13c0088f7a90fb7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SGB502219692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689935146549478d8227430d2006c4a15d65d5da1ee76a1fe8778fbec2a42bec. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SGB502286606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38af49212d2ae3334acd625a3f47c7ca2f8d311bfefc1808e54d1e337b9f5f08. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/SGB502312835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7112d3dac6dbc45d2051d47985a62c49b50262fd762a4b777da254ad649a0d4a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SGB502315053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bd07b4b4dd5f196483ae12c50673d8c3bbccafb6243632f010db17e87ad31e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SGB502331386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7435f6dc5319dc424c18e9c038e3939606882c9a03535d278276a9f4a356ec. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SGB502328060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8067a22a6e9a06a5fac508991baaf7fd72fcb957c536802b86341873ed86d4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SGB502331375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc026630bbc02a5be9814ec6aa81fdb80caeabb8c4c91880854f0cf0685ae03c0. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SGB502331379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00419aa1a390399a8553c9f451a5dd204863cde6b6825c6b1a82be4cfe1a75a1. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/SGB502338772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43aae6e323ca4505263d3a2eb465d2cc8df9bc3767fe53123670184f9b8030cd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SGW502353916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eeba9d0c4bb9a609cacb8765418abffe6d2510991f7e5e2971627d3e9335f26. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/SGW502361685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e2fd66cbc734baae6b50299a7d597b3ef77762ca286adfb3c758b0de0db623. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SGB502470813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bf6976e895b53af26c613fdf6a391bd79e998294bb0486d52bd59ca989a3bc. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SGB502488577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdfb5a301cc08be5ec467a358faca5687fafaba88be4cd02627b067457e5766. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/SGB502488579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc494a2623226afa4cd8436ec6a974321f1c1a5bd204468d88c4647adc773617a. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/GXD7G2453596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594a746785b77926dfe3f69ced4836eee928ad88b9b7cf1e3c69f858f8ffa8ab. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GXD7G2478523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4810f8d6308e91f0950c1d94e3f9f3e790082a3b7b92d52d5ae9be0c39740ced. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/GXBAV2267547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e11070e41dfd36dac75ca0532ca5f77d641fe7258bc318a38a7be3b39b6e50b. 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/SGW502210942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44898f9321a2db5a39c8b6a37ebfe51dace49695bc905e783cde89219c1e9613. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/SGW502224467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bd8d234449ca2cefb21c39cec820b8ff3573edfe4a08723a92d9caaae34abb. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GXD7V2592930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f65d8663787e815ee70eac2fc5cd06a37913a87fc4aa9894ea10968641a0174. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GXBAV2170464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2a1da6e287e5841caeafe441d9a57c9860c0536567c0015bbe4db5a371aa06. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GXBAV2118742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d604fd731d0299c3e051b03f58cf1fcf930b32593565f56ad04c6da6acaab1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GXBAV2172866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ea684a0057495aba205e6a9766780de97ef045b154b48b60eb1e34ac2dfca8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GXBAV2150817.