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 0x4cd864196d7565d82c9ff91766e02d69dac4556a48311f9210a98f96cc2827fe. 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/06d3d5ac-57a0-4b72-ad44-41e95d77b3a9.json and https://artists.proofprofile.net/proofs/artist/06d3d5ac-57a0-4b72-ad44-41e95d77b3a9.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 0xaea1dea42235f787731707beadf592141b60ef1392438be67defb6b5f2326783. 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/BCHFD2300271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1180604668efea1f7ac8309173370e79d9d603ff8e740718a7351dba9f08f504. 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/QZPEW2553192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2378c368bdebfa013383da012766809c376cbceb8cf43db9feefc9bcbc6cfa67. 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/BCHFD2400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68fa85696c8079a2785069c2865681efb4119e32808f827112d304f2de0cada. 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/BCHFD2300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65846bfe4a578e51799e057dc4c4d0e719dd146dea221c7c962e66d5ae10a245. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCHFD2300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1061323616796652809e7ac4233a409b382591f98c7ff05af568143d9e0e0ad. 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/BCHFD2400366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2396f05c89ec81a4699e8b1ee500d0adcfd2b32d174eae888ba2fac7b7cefb86. 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/BCHFD2400329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cba43f2b6f1a594f721dd800d73da3f3585a5f2d614aca0355f3c8d69664d4. 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/BCHFD2400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d94817b408c62932d7637971f813000021b5675418190d735b9c4671b87131. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCHFD2400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57dbb1a899a3f47b24b1bf754d1d4a88ace7791d7d84e3f6f3daa1029e5c4b1. 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/BCHFD2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a9dfb820b153a0f9f487fdaddca5e023e0c2b5441fa88e98af232b76ad74c0. 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/BCHFD2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbd56a380ca8ac7b012a77d5d7d4b3413fe15de3f60473e194976ee68df2f58. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCHFD2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5163f0262fd39fb69985393b2feac545f6226f19b8e0f8569f9eb1230bd898a4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BCHFD2400044.
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 0x7e81f7f8537ca3333d24c4abeebd6d168a94bf575c81e9982bbac48aeb82d4d6. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BCHFD2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fd003b060b45847b540b73b86debb449a7c924692d804629c49837e0118a87. 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/BCHFD2300266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d56cbcede4296fd7fe56357b5d0f6fdaa13e2a63630ac23c35af8f06adcd53d. 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/BCHFD2300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a9a4e2d12d57e4f9655a642900d46c0c45fa9b1f7c227afa6b0868984514c4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCHFD2300186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265e3772b55d0e308c25878e1b22cc4f77cd7f650f079894c09b660e9d0def0e. 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/BCHFD2300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf341b8e3d114a0f7294a9690073f9701eaf44ba6ffa6b78ccecbc33cc27c250c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCHFD2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fcbe302cbd26e9c398fee331e3f425713b9baefe76c4cb86dedc9651911115. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCHFD2200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ec94dc2362701d38df106fb5ddb661f17cb8d73c17c4419d9f8a2d5d39fa06. 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/BCHFD2200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38a84dcbfc5bb2a2c36b91635e101389f82548d5fe323e2e579f486f48af001. 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/BCHFD2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ceded24e1585c8ad9d5d16c82ef40466aaa80911a1b943a7a47f43fde4bb99. 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/BCHFD2300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa662ee0905dc772413bbe98af6ffd9bd05ba648b97437b2692bf924982dfe0f. 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/BCHFD2400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6f6b471340f3ed803715c0329429bb82a9ee3cad0334e1303fbd215858d210. 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/QZTRX2523166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa155f2c747084d5e138bf74d3172f781be0013042db2aeeb987c691337a3f348. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKP9L2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bce898dd16b6a6953894330969db1691253c298bbae1a02f30f83d41460f7e. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZHZ32106578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33653f287b9a86cf11b1968e5f68b5b0bcfd3469da06d6188808cc515a8a68c. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BCE7P2403269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4748df0323885e6a59528822c533c5e8445a9495d62ff7c03891310fbe8f1a95. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BCFCV2401560.