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 0x4a18d6839041ef60e255553960344a8d6a37c19f7964fae7a894c73c40e08b96. 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/7a1d6b19-c37b-4eeb-8f20-63679e3ed4f4.json and https://artists.proofprofile.net/proofs/artist/7a1d6b19-c37b-4eeb-8f20-63679e3ed4f4.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 0x7a5c287cb905cbdde1e0dd8f5ea2076603f087649996ad91b55562dab9f491e3. 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/TWA211350501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f278778e823e1a7527869e4e243bfe7dc43b16cf0e368123417b1d461093fe. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWA211328602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8912c14a72a71b8a3a6435da3c34cdde607f83cb102ae6ee4752b85cfca791aa. 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/TWA211350301.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386eb9f8541c81632843e46fdbddde42980e1ed3a329685670c6a856b6de6fd7. 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/TWA211350401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8a478f8bafd1154ed1ad85df333c3cc44e46c0c323476315e6bbb16080be27. 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/TWA211328605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577ad876b871913dd0ef451615d8f01abae2b79aa22967ac7747782846eab045. 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/TWA211328606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa74532b7394cf19fc67bca82c305be57db1bd60d1f1ec4c867f3910a7b063a7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWA211328609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd904fa156fef901a6e14d6db716217d2c4c2dfc86c3953233cb35a1555b78afc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWA211227001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b27c775141fc864a9d0095a7195b4183d3f05d8a2b9e8587cfeca3e3fd263d5. 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/TWA211227002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa8d933f5afd4635442df3eadbe095ecc1e5c7934655fd690362e2d218e237c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWA211227004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03563c158ee83c0b50c56ce433e9a13210660d44a70d7dd9da4700598eba4de. 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/TWA211227005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4338520215d5dd96ae52bf8811c7bf92172944906aaf4dd90f8a9b3a9cae209. 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/TWA211227006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd110a722591f9d36befb9eebeb1b9fb96929f0c657cb03d3ef1c140e0bd9c395. 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/TWA211227008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4f046bff5356ffb0e32ac78fe8a1f75aae0b5d9a7d4947af0f83b77e36e017. 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/TWCG52099930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8912c14a72a71b8a3a6435da3c34cdde607f83cb102ae6ee4752b85cfca791aa. 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/TWA211350301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386eb9f8541c81632843e46fdbddde42980e1ed3a329685670c6a856b6de6fd7. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TWA211350401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5c287cb905cbdde1e0dd8f5ea2076603f087649996ad91b55562dab9f491e3. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/TWA211350501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa8d933f5afd4635442df3eadbe095ecc1e5c7934655fd690362e2d218e237c. 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/TWA211227004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ba43f3685c4bc58717074c2e356af3500b921d1f653de5e46ebb1f131c689a. 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/TWA211251001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03563c158ee83c0b50c56ce433e9a13210660d44a70d7dd9da4700598eba4de. 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/TWA211227005.