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 0xbe8341a7ee49f8e7121d429a7135562f2badb627def820e693a73c5368c635f3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b0aefa4-c331-402e-8716-e4338e51fd8d.json and https://artists.proofprofile.net/proofs/artist/8b0aefa4-c331-402e-8716-e4338e51fd8d.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 0x4a96b684b2211c5e52428160dc93837477d6a631410cb8a59c31dad33fa645a2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ITP9L2100307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449490877d1b81504e99ccbb5e456bbb3c435aa77e19a4ed147225d5135265a9. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/ITDXG2102201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58085c18979869cf6f20ef08006474186cfccb68d9c911460dd39268c7f55d9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:47:55Z), 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/ITDXG2102501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5504f8cb65c851310fedc5b31ba435587badb7817309830f35e912a0b33a0ce. 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/ITDXG2102601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f0138e6393db22c4e13bb17bfe96972d6ec89f311e30a7b3ac22d610be7166. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ITDXG2102801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07e8e1cdd76e3b2d3a8bbc9cd575808b2d459204284705cc20bdd286dfa7593. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ITDXG2102901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c5f8337b4c034876bf6d0a47445a4b22442e27e0a701f6ee0bda3155b80711. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ITDXG2103201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f41e261134d801e6a9424a4f86157f7eccfb6e6b196969e7ec1bdff42df6538. 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/ITDXG2103501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ebc2a243753f178443bff3e5ef7b15140442aaec955c9671d0060d8e9012ed. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/ITDXG2103701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6ab8f73c5174b0403ecf3bc49a7bc09e7dedaf55d28afe280f31325f7e357e. 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/ITDXG2103801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea702e747a7b721ea052b9c89be273767f25c637444ada0697613abdfabc112. 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/ITDXG2104001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b7565a872d52d2c90d9dc9477a3f5eb48307d1f65eb02eea065cd97d76c22e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITDXG2224201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c243f27beb4397a93501371abe9d39beb3ac34743b38b3e5b6a5f54d6a2420. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ITDXG2224401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce48d83fa3d9b6dab2e75759e1c1a0ba39f334e35881014d0934d2d171105c0e. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/ITDXG2224701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69bb3a9260f9f2198612fd5f934c9b1b5c7399f319c268677e6df04042dd7ce. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:25:06Z), 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/ITDXG2224801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f99a556a813a3bf9fe5a3a9cdd4d30137b6ccd70c043ce1dd5883ab237e08db. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:05:37Z), 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/ITDXG2224901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0bac7befdbf0636c1306a1bea40e30683e18a84c79c974f2148f306f1c5176. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:32:45Z), 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/ITDXG2225301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52b3ddc67d6b7f371975311d383fb1ecf75714b66f4a158eb8fba312264a3ff. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/ITDXG2225401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542d8445aaed91689623fec3c64fe050b74934aebd43e90548557cfa07d4c4a5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ITDXG2225501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bdc7a4ea662edca4847c69ba481f50e6b01d3591d7d34488076001c3dcd769. 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/ITDXG2225701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad55c910a9fadf69f25158080d1324a5b1fb53f95c7ffea0e72d048ebee5e432. 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/ITDXG2225801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d75efb1ce255ff7804e235a51480a751ec126621c4a15dbd29f097c9eada62. 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/ITDXG2225901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a262751662f35498cc5ad20f8d64078dc32afcfe82d2ab2bae8fe95e1f376e. 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/ITDXG2205501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02eaf10f3960aa4d745eb06c6d12cc11ef876d7d820d4d71ad3b09eb9b552b42. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:05:08Z), 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/ITDXG2205701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc424aaca0e1e7ccdb335645ceae4cb5c3dc0e6845f89e5d788fe3f4801661c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ITDXG2206201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317c280b6f277a0ca95897dd4027ddeaa1e9817131d030e048c9f9966fc077ef. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ITDXG2206701.