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 0xa5413cadb3b021f111bbe414d9f2f1e21c30a3993851ba59ad9ef0b5b4654212. 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/c56d95fa-2372-4946-bc0a-b8b1b528fde1.json and https://artists.proofprofile.net/proofs/artist/c56d95fa-2372-4946-bc0a-b8b1b528fde1.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 0xb5845ba20745804c4693f228cb543f52359d2e45e4a17e9cebb2153717733867. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/FR6V80532776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc20963243ed180c15bd266e600105b46adba3935a80aec7a7b8fdaa9e73edcc. 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/FR6V80532783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734b57de20fde61ad38813c25b7db8f0540fa8bab798c5a34c458b6bbcb08879. 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/FR6V80388027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba458c3b5abace4f8322b40f9991e8420da566fcc3ca6d81711122fe50a5a5d6. 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/FR6V80635881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124d11ca3c4eab97a1f6c7d8f4ca28816cf8ecde8ed2fbfb1561054fa9c2be42. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/ITN850800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf10485bd0537461bbc29a7317a7d4a2217168840fa01389e0edec1de6022645. 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/ITN850800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feefd7db022456c443137bab9c0a5de8a2511b492353e3ae12acbe2057c1503. 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/ITN850800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c12db4247a9ff240725c9f1f8ae356336d8f8385fd72dccc85f47e6aa9c6860. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ITN850800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baea871223a0a20da856bfd61c2e88255a59d3325aadfc19b9970b8c0a7ad45. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/ITN850800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fb213059d3a3a06705e5d0017c6fd915403e45e2933e2e71839601dd02d447. 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/ITN851000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3811690eb667009d40eb733759224fd1110a74f36d0a41bfe220650e36e4990. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/ITN851000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18461d838727d3e9d0af5e5530921d6cf092976a2474bc3e5c715739c5227575. 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/FR6V80088211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8025149476576640dfcd24bc5d125f3c46aa988fe5b08b5e88a6966574c3a4a4. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/FR6V80088215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1163ad907edd0460e2aef3116f2e953b8c9f5621d617d393bf30f56641715c58. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/FR6V80088220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa999b0cd9520b13804d9941ba979617c754f4d16e36e7740155db020b5dfa33. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/IT8NY1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a54ad9a9840f854d9f94c73c1bbdff73d5b99447fb275152553db46e024417. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/IT8NY1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5c5e2d23d733432f4da7cdf2ce6ef518273e76731cac9cde3c3f619c6f3dcb. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/IT8NY1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0910a57e28dcb948af1c69fef4244a5095c4e85f0915640043a76b7b0e42ef02. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IT8NY1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a67ccfffe45fb37729f01b53d894afbc9600653aaa1939e1dd410e6885a769. 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/IT8NY1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33621d697f4eb057321bbc5f21fe5866dd680ea15e173744c391b73e1b616464. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/IT8NY1400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c78d3a97c8f9261532d689b7629125ffd032377f997c8d23a244ae4f96f9c6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCADP1869294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34525f438f68feeb9cd58b16f8429abdef0f1f86fccb3355f59a7472603647df. 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/IT8NY1900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f8967e051c435a4eaf57cf36a562eaf8274ffd96faabef72bd54351c7633dd. 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/IT8NY1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea02fc263388c3666dbb02a7c41460ef429e08b12612ccf588fa9f83431d6300. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/IT8NY2100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb74cbccd47131d6ed173d3931b89b701b33c16f67a9e1869f5ff4b34886bbf6. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/IT8NY2100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ef210a900478bfd78c0e08e2737c8bb64bade35df4c931162d6d8b405fd418. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/IT8NY2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fec6188c5d41ba131ab3f8637822c4cce529ab1308d8a31217a7f27a31deeb8. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/IT8NY2400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53937587ae1d28bf7330dedf29314770f4d7e93fbf1d98d6b360b1e43fca070e. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FR6V82540165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265dbb8e6e701f8fdfb64d805f7be8f5fe427532546f4e52c6c19840ce84839a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FR6V81471876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ec72569032d7646c793fa4a118e53cb8960872fd67f1d1fb5f15aeb99d4e65. 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/ITUM71501537.