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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3ff2a3d6cd7b54fc7f690121dc2a896db4b29d01f9d671d7ce5e25fbb71aab. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a330dcb3-3caf-415c-a5fa-8334e2411fcc.json and https://artists.proofprofile.net/proofs/artist/a330dcb3-3caf-415c-a5fa-8334e2411fcc.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7aa74b20c555142dffb42bb3ed5fbf9c0a7f4deffeb0632c3a52bbb08be471. 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/GBPS86358367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3375aa769413ade4b199f0f88b56754a063ab703c4bc560af556411131deaf4e. 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/GBPS86358363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e1a3201fb823b72e7ae0b5a12f4423f2f253076e2599f50f337eca25a33d5e. 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/GBPS86369654.
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 0x965b7efa1571a651d97cc5f48dc988bae3da0b83d2dd99d5d90419cfa10d16ad. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBPS86369644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd808ead8dddf4f20f02040beaffe9945d6d94843834c1403cc06e3b80486bfa9. 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/GBPS86369640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa4be3ac490b1fbc7646e6eb52e6f8fbbf284fb8e1bbd7ead29dfd6944d153f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBPS86358375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d3c9b03e8f2e626a565ff16c9096a077dd48b611678a9e44931f180e6e16a4. 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/GBPS84323123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d59d610797cf497abf0601958516956ecf658ad66067f7ad00f64550f097ff. 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/GBPS84319271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb361045fc7e22ca1bf114dcac7ca0e3489706de24a558be35e3cb7c9621cc86. 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/QZGWW2086364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61db797690711dc05891bdb835802ffe0ada886b901e8451789030766f771ac5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGWW2086369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01997a80c723cd472870249e3935729a45b00eb3c9aa1773c01261bd469917c9. 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/QZGWW2086372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1185ea279af16be5a9d3b5ba5655d57630ed87cb267ba25c546891e1d375926. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZGWW2086368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431a195bd5965d4b37169b37e7c22be77240da7dd7f28ae9763b3201189344fb. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZGWW2086371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243224b4976d9092a48e5139bf99b8aafa06a307301ff4985e997d1b1b44b0c8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZGWW2086374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6810bd97aded62556e93a3021aad16b17977ee9dcf102426ad03350fdc80f6e5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBPS84337331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50246e90fb3b5cbd3b02cfd5d9e4e3be1a1212b6db3763e776faf4c37586a01. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBPS84637212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d67eeb45ca104f88bd97c05745ab3660813efec56eab091a3ef1836bbc10aa2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBPS83866990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29bdb9f1538bfa3f315c7e640430495852c640b454dc492562f728cdd317e7d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBPS83866711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f1484d0e2c3059309e3776b95508edd39d0ba553b0d772c6525dd0b9ef8154. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBPS83866854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ace4aa009ce6747f748ab9e562c60f9fad9246c30f05e5416c5b866e072795d. 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/GBPS84450354.