right|300px|thumb|A silver fir shoot showing three successive years of retained leaves thumb|304x304px|Cupressus sempervirens (Mediterranean cypress), an evergreen tree In botany, an evergreen is a pl
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 0x7c154f4e52b91694d101804881e55226eeba921d129e176929817cc1f2870d6b. 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/1342b895-2f75-4861-8c45-2c203f3a57c6.json and https://artists.proofprofile.net/proofs/artist/1342b895-2f75-4861-8c45-2c203f3a57c6.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 0x537fa58c96272a592606253a38252fcd786d5a1e0444b6fd69b0107752d4c839. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/GBUM71400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fef61f0d3fd9e10729966040956ab52d46ea6c4e4dec64155c8872dc70ba173. 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/GBKPL1512533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54688ceabf4fc243e6668409d1b751b9b75bbd324ce637f136717c9099cbd136. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FR6P11701370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe160c5862f5fc6bd8c9af1172acfbbc4831c748549734f5f87b7582a7188b52c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR6P11701380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe089c7d2fdc68c574bc188a3bf7dbd89661afa2c698dfe22e9f178c0bd20a300. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/FR6P11701420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d711e76d1956110fb550cbd7c8af0c6400fe5994db73f80bbbea50bf2908513. 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/FR6P11701410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a119429663d2132b0357d04c7af39003c36bd38a985fd4e090ac9350302161. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR6P11701470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c1629c2b382750daf81be0b16c7333cd9bd2c038d9a080d7dd605784ae1da9. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FR6P11803470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070eefdb9d836d663b68e1582d633ab6e2135a8f01cc39b512341bf66258a0be. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/FR9W12113403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd088c36dd1258d1ea0e536acc8c7594e7b6152d9340cf967385cd4c76a884b3a. 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/FR9W12132629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d29e0b66de3671e8a260618386dad56f1084f554927e93128afc38ce0b5a1f. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR9W12231049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6f4cfc8a6497af5563a9b5237197e369aba6000c0d00121219c682e292fbe5. 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/FR9W12235641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6f4cfc8a6497af5563a9b5237197e369aba6000c0d00121219c682e292fbe5. 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/FR9W12235641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe094d88bd91d59ab8a6b453cd94c8acecac2f088bf7b52835a79b3fb9fdff448. 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/FR9W12235645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f4824195025e8578744d2b0e9496fd1b086455459faf830aebab755f2e738e. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/FR9W12235644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21eb801530dedd2e5b13a664e06d5ee46dc0c9f3c7d79f8564337b6a9e24d0cb. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/FR9W12244656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ebedda6aa2f11abfeb691bef2edae4740fdae156327ef5447ec9faad3658d7. 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/FR9W12345204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c19ecc3397279e1b176a96b6160345720c509df07f437ffc70f2118494832d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR9W12426203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f14a7e61a1b52d7837d697644fd802c5ecc3663eec7644d16ea2847b6e5471. 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/FR9W12426205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2d76e3b765381adfb529867060a78688c07aa4f1ad4c22e32f4e30953d6b1d. 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/FR9W12426209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46798483fac35c3de5c002f30a476c89d816517d4867f9ebf96aa6f0fdf47d57. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR9W12426207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f14a7e61a1b52d7837d697644fd802c5ecc3663eec7644d16ea2847b6e5471. 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/FR9W12426205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e73cc556a7e1605c6f08dfce458751ed576c859a88160921fd379d0d0ed74ba. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/FR9W12432345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e1223667c8d795c32726af7eb5501be6cfdc11e3b149cd7fbb57d4b7b7a931. 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/FR9W12426208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2d76e3b765381adfb529867060a78688c07aa4f1ad4c22e32f4e30953d6b1d. 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/FR9W12426209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc05f40db8e68f2c32125c017743dd63a9d446929b07c1e7f383f225e97ef71. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR9W12426212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91aebbe77ea619f27c6d3169de47cc5b36ab7fe98df68c6bfc95fba67d096b75. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/FR9W12426211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb100bf1d7594e24560c06614b00a2c7d65fc6e0a6a506f4368002912a58b20b3. 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/FR9W12426213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78feed1865f6c5c65237618078d8523d3942ae1c8ff2f1fa72f073d4f8bf96a. 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/FR9W12426214.