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 0xe8672c42ec390213656f715cfda9a2383abba08eeef177c837282c1cc4dce55c. 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/7fbced2e-3920-4a98-a6d1-3180f53c9f7b.json and https://artists.proofprofile.net/proofs/artist/7fbced2e-3920-4a98-a6d1-3180f53c9f7b.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 0x78f4cd2e9209712e696897b9b4cfc48b854f44b59a8470c157ed3831894dfef8. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLC288000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d08a6c39b0881132683c7be286c7d30b76e5ff18b552aa6451f0a32bdf7600. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:48:05Z), 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/NLC288000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f8160a1c2c37596b6a4c1604af2be418aec9b39d5ddc30b48c9193450922c7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLC288000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d9c8496b50346079ac6e6c42bd0e7085682d3a6d84ed7ba4a4adb767ba15ed. 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/NLC288000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb3f0f95aa4239c6e054640ee02495f3f65057ff1402b44373318df1fa94943. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLA241800750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c9f5bbd0beed8ed68fe27647d944c77fcf4c818994d3423f31f0bc18578e95. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:28:06Z), 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/NLA241800740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aec71b661d1912a23fcb3fcc0ba28fac7ba3a531a2a5b5abb8d9a1444e1b0a7. 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/NLA241800741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c31f05bc5940b12addb7983e863da46817cea5324b82edcc6926e32877f51e. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/NLA241800746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe167ab0142b68626250e19d83d78b191270c74180bf3ed564384043538586e1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/NLA241800747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb3f0f95aa4239c6e054640ee02495f3f65057ff1402b44373318df1fa94943. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLA241800750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082b6dec7bc11f09536a7fbabd2da1d9463ec55639cc36b6a0f54e4ac450075e. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/NLA241800091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5665fdcfbf81f8835e3b8303a7dd18671f83c16dcdab4c28147457b0d3c10dbb. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/NLA240100235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089461ee3a21ec3df3386108ef2fa4590eda37737ce82e518994747b765921ad. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLA241800093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd35e7b57b69996de019ee06c4081506ac760d232d2baed153d05adf230ab92. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/NLA241800096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba812a1c54646e8f5b49d6e14b533b4c26ec8e5785a9ca8cb95fdff2d08fe87. 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/NLA241800097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01037462e1ead91c27f13505945ec02fcc6b9882159c14db5a607dff2dd17d09. 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/NLA241800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c5a63a5a167c102e3df924fcf80bef5077f5dac553d832253b249ad1d0e1d6. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/NLA241701987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4cebe46478d9e873ae7893668e70b9eeb6157b3d3e46de69b35b65706c487c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLA241800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a3acdb59d4c8dd8df442b4f31d8d1ab68f9514c8f9ac6a7260a8dd1554a2bc. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/NLA241800143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4293798e0201d47419aa66df0a9559179098ebd1494ebb37b5e6a86ce6111b3. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLA241800153.